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UNITED SCIENTIFIC SUPPLIES Black Rubber Stopper - Rubber Stoppers

UNITED SCIENTIFIC SUPPLIES Black Rubber Stopper

The UNITED SCIENTIFIC SUPPLIES Stopper: Rubber is a black rubber stopper available in sizes 2 to 8, with a 25 mm overall height. This autoclavable stopper features 2 holes and is identified by manufacturer part…

SKU 3G-OTH-381365

Also listed as: RSTPK 4 · RSTPK-4

Brand
UNITED SCIENTIFIC SUPPLIES
Item
Black Rubber Stopper
Category
Rubber Stoppers
Available to Order
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Technical specs
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

UNITED SCIENTIFIC SUPPLIES
Manufacturer Part Number
RSTPK4
Type
Black, Autoclavable
Material
Rubber
Color
Black
Holes
2
Overall Ht
25 mm
Stopper Size
2 to 8

Technical Documents

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UNITED SCIENTIFIC SUPPLIES Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The UNITED SCIENTIFIC SUPPLIES Stopper: Rubber is a black rubber stopper available in sizes 2 to 8, with a 25 mm overall height. This autoclavable stopper features 2 holes and is identified by manufacturer part number RSTPK4.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the UNITED SCIENTIFIC SUPPLIES rubber stopper used for?

This black rubber stopper is used to seal laboratory flasks, test tubes, and other glassware. Its autoclavable design and 2 holes allow for insertion of tubing or probes, making it suitable for sterile applications in research, pharmaceutical, and educational labs.

What are the specifications of the UNITED SCIENTIFIC SUPPLIES stopper RSTPK4?

The stopper is made of black rubber, fits sizes 2 to 8, and has an overall height of 25 mm. It features 2 holes and is autoclavable. The manufacturer part number is RSTPK4, and it is produced by UNITED SCIENTIFIC SUPPLIES INC.

Where to buy the UNITED SCIENTIFIC SUPPLIES stopper RSTPK4 worldwide?

3G Electric supplies the UNITED SCIENTIFIC SUPPLIES stopper RSTPK4 to customers worldwide. We handle full logistics, customs clearance, and delivery to your location. Contact us to source this autoclavable rubber stopper for your laboratory needs.

How to select the right rubber stopper size for a flask?

Measure the inner diameter of your flask neck and match it to the stopper size range. The UNITED SCIENTIFIC SUPPLIES stopper fits sizes 2 to 8, covering common lab openings. Ensure the stopper is autoclavable if sterilization is required, and choose the number of holes based on your tubing or probe needs.

UNITED SCIENTIFIC SUPPLIES Products

3G Electric supplies UNITED SCIENTIFIC SUPPLIES rubber stoppers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Stopper: Rubber, 13 Stopper Size, 58 mm Bottom Dia, 68 mm Top Dia, 25 mm Overall Ht, Black, 2 Holes (MPN RST13-H2)
UNITED SCIENTIFIC SUPPLIES
Stopper: Rubber, 13 Stopper Size, 58 mm Bottom Dia, 68 mm Top Dia, 25 mm Overall Ht, Black, 2 Holes (MPN RST13-H2)
Stopper: Rubber, 8 Stopper Size, 33 mm Bottom Dia, 41 mm Top Dia, 25 mm Overall Ht, Black, 2 Holes (MPN RST8-H2)
UNITED SCIENTIFIC SUPPLIES
Stopper: Rubber, 8 Stopper Size, 33 mm Bottom Dia, 41 mm Top Dia, 25 mm Overall Ht, Black, 2 Holes (MPN RST8-H2)
Black rubber stopper with size 8-1/2, top diameter 43 mm, bottom diameter 36 mm, and overall height 25 mm. Used to seal laboratory flasks, test tubes, and other glassware to prevent contamination or gas escape
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper with size 8-1/2, top diameter 43 mm, bottom diameter 36 mm, and overall height 25 mm. Used to seal laboratory flasks, test tubes, and other glassware to prevent contamination or gas escape
Black rubber stopper, size 14, with a top diameter of 90 mm, bottom diameter of 75 mm, and overall height of 25 mm. Features two holes for inserting tubing or probes. Commonly used to seal laboratory flasks, test tubes, and other glassware to prevent contamination or gas escape
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, size 14, with a top diameter of 90 mm, bottom diameter of 75 mm, and overall height of 25 mm. Features two holes for inserting tubing or probes. Commonly used to seal laboratory flasks, test tubes, and other glassware to prevent contamination or gas escape
Black rubber stopper, Size 12, with 2 holes. Top diameter 64 mm, bottom diameter 54 mm, overall height 25 mm. Used to seal laboratory flasks, test tubes, and glassware; holes accommodate tubing or probes for gas transfer, filtration, or sensor insertion
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, Size 12, with 2 holes. Top diameter 64 mm, bottom diameter 54 mm, overall height 25 mm. Used to seal laboratory flasks, test tubes, and glassware; holes accommodate tubing or probes for gas transfer, filtration, or sensor insertion
Black rubber stopper, size 15, with 2 holes. Top diameter 103 mm, bottom diameter 83 mm, overall height 25 mm. Used to seal laboratory flasks, test tubes, and glassware, preventing contamination and gas leakage during experiments, distillation, or storage
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, size 15, with 2 holes. Top diameter 103 mm, bottom diameter 83 mm, overall height 25 mm. Used to seal laboratory flasks, test tubes, and glassware, preventing contamination and gas leakage during experiments, distillation, or storage

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Green neoprene rubber stopper, size 10-1/2, with top diameter 53 mm, bottom diameter 45 mm, and overall height 25 mm. Used to seal laboratory flasks, test tubes, and glassware for secure closure during mixing, storage, or transport
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Green neoprene rubber stopper, size 10-1/2, with top diameter 53 mm, bottom diameter 45 mm, and overall height 25 mm. Used to seal laboratory flasks, test tubes, and glassware for secure closure during mixing, storage, or transport
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Black rubber stopper, size 11, with a top diameter of 56 mm, bottom diameter of 48 mm, and overall height of 25 mm. Features 2 holes for inserting tubing, probes, or wires. Used to seal laboratory flasks, test tubes, or bottles in general lab applications
Solid neoprene stopper in size 8, green color, with a top diameter of 41 mm, bottom diameter of 33 mm, and overall height of 25 mm. Designed to seal laboratory flasks, test tubes, and bottles, providing resistance to oils, solvents, and moderate heat for general lab and chemical use
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Solid neoprene stopper in size 8, green color, with a top diameter of 41 mm, bottom diameter of 33 mm, and overall height of 25 mm. Designed to seal laboratory flasks, test tubes, and bottles, providing resistance to oils, solvents, and moderate heat for general lab and chemical use
This green neoprene rubber stopper, size 4, has a top diameter of 26 mm, bottom diameter of 20 mm, and overall height of 25 mm. With 0 holes, it provides an airtight seal for laboratory containers such as flasks and test tubes, suitable for general lab use
UNITED SCIENTIFIC SUPPLIES
This green neoprene rubber stopper, size 4, has a top diameter of 26 mm, bottom diameter of 20 mm, and overall height of 25 mm. With 0 holes, it provides an airtight seal for laboratory containers such as flasks and test tubes, suitable for general lab use
Black rubber stopper, size 9, with 45 mm top diameter, 37 mm bottom diameter, and 25 mm overall height. Features 2 holes for inserting tubing or probes. Used to seal laboratory flasks, test tubes, or bottles in general lab applications
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, size 9, with 45 mm top diameter, 37 mm bottom diameter, and 25 mm overall height. Features 2 holes for inserting tubing or probes. Used to seal laboratory flasks, test tubes, or bottles in general lab applications
Black rubber stopper, Size 4, with 20 mm bottom diameter, 26 mm top diameter, and 25 mm overall height. Features 2 holes for inserting tubing or probes. Used to seal laboratory flasks, test tubes, and glassware in general lab applications
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, Size 4, with 20 mm bottom diameter, 26 mm top diameter, and 25 mm overall height. Features 2 holes for inserting tubing or probes. Used to seal laboratory flasks, test tubes, and glassware in general lab applications
Black rubber stopper, size 10, with 2 holes. Top diameter 53 mm, bottom diameter 45 mm, overall height 25 mm. Used to seal laboratory flasks, test tubes, and glassware, preventing contamination and gas leakage. The two holes allow insertion of tubing or thermometers for controlled setups
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, size 10, with 2 holes. Top diameter 53 mm, bottom diameter 45 mm, overall height 25 mm. Used to seal laboratory flasks, test tubes, and glassware, preventing contamination and gas leakage. The two holes allow insertion of tubing or thermometers for controlled setups
Black rubber stopper, size 10-1/2, with a top diameter of 50 mm, bottom diameter of 42 mm, and overall height of 25 mm. Used to seal laboratory glassware such as flasks, test tubes, and bottles to prevent leaks and contamination during mixing, storage, or transport of chemicals and samples
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, size 10-1/2, with a top diameter of 50 mm, bottom diameter of 42 mm, and overall height of 25 mm. Used to seal laboratory glassware such as flasks, test tubes, and bottles to prevent leaks and contamination during mixing, storage, or transport of chemicals and samples