Black Silicone Coolant Bypass Cap, 1 3/8 inch ID COOLELB90 00) to clamp the hose

00) to clamp the hose over a 4" OD tube

The 4-ply reinforcement results in a 5mm wall thickness (86mm / 3 3/8" and 73mm / 2 7/8" OD) and a working pressure rating over 15 psi (78 psi burst pressure)

ID: 76mm (3")

5mm wall thickness (87mm / 3 7/16" OD)

The 5mm wall thickness results in a 2

Black Silicone Coolant Bypass Cap, 1 3/8 inch ID COOLELB90 00) to clamp the hoseThis 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 35mm (1 3 8") ID, 43mm (1 11 16") OD and measures 38mm (1 1 2") Long overall with a 30mm depth. Maximum temperature 392 F (200 C). Operating pressure rating 14 psi. Black silicone rubber only. Sold