FLEXTECH Hose Reducer: 3 1/2 in_4 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone
The FLEXTECH Hose Reducer (MPN R40-350/400) is a blue silicone SAE J20 heater hose reducer with a 3 1/2 in to 4 in hose inside diameter and 3 in hose length. It features silicone tube and cover materials, with a…
SKU 3G-OTH-457300
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Product Description
The FLEXTECH Hose Reducer (MPN R40-350/400) is a blue silicone SAE J20 heater hose reducer with a 3 1/2 in to 4 in hose inside diameter and 3 in hose length. It features silicone tube and cover materials, with a temperature range of -65° to 350°F.
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 a FLEXTECH silicone hose reducer used for?
A FLEXTECH silicone hose reducer connects two different-diameter heater hoses in automotive or industrial cooling systems. It transitions from a 4 in hose to a 3 1/2 in hose, maintaining flow while reducing size. The silicone construction handles temperatures from -65° to 350°F, making it suitable for high-heat coolant applications.
What are the specifications of the FLEXTECH R40-350/400 hose reducer?
The FLEXTECH R40-350/400 is a blue silicone SAE J20 heater hose reducer with a 3 1/2 in to 4 in hose inside diameter and 3 in hose length. It has silicone tube and cover materials, with a temperature range of -65° to 350°F. The manufacturer part number is R40-350/400.
Where to buy FLEXTECH hose reducers worldwide?
3G Electric supplies FLEXTECH hose reducers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver the R40-350/400 and other FLEXTECH silicone reducers to your facility. Contact us for a quote and delivery options to your region.
How to install a FLEXTECH silicone hose reducer?
To install a FLEXTECH silicone hose reducer, ensure both hose ends are clean and dry. Slide the reducer onto the larger hose, then push the smaller hose into the reducer. Secure with appropriate clamps on both ends. Avoid over-tightening to prevent silicone damage. Follow SAE J20 guidelines for best results.
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3G Electric supplies FLEXTECH silicone sae j20 heater hose reducers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.









