Black Silicone Coolant Bypass Cap, 1 1/16 inch ID 11583 This silicone duct hose is

This silicone duct hose is not made in any other color

Outer layer: VMQ silicone rubber

These 45 degree reducer elbow hoses have a 25mm ID at one end and a 16mm ID at the other end to connect a 1" OD tube to a 5/8" OD tube

5mm wall thickness (106mm / 4 1/8" and 93mm / 3 5/8" OD) and a working pressure rating over 15 psi (78 psi burst pressure)

Black Silicone Coolant Bypass Cap, 1 1/16 inch ID 11583 This silicone duct hose isThis cap features the same water and coolant compatible silicone rubber formulation as our silicone coolant hoses. It is designed for capping off coolant bypass or vacuum fittings, but it can also be used to protect fittings in storage. This size has a 27mm (1 1 16") ID, 35mm (1 3 8") OD and measures 38mm (1 1 2") Long overall with a 30mm depth. Maximum temperature 392 F (200 C). Operating pressure rating 28 psi. Black silicone rubber only. Sold