1 Set 8mm ID Silicone Coolant Cap with Clamp for Coolant Heater Bypass Red 2"-2.5" OD it is tightly sealed against

it is tightly sealed against water ingress

for Chevrolet Silverado 1500 6

They provide the best combination of traction

Outer Diameter: 45/64"(18mm)

1 Set 8mm ID Silicone Coolant Cap with Clamp for Coolant Heater Bypass Red 2"-2.5" OD it is tightly sealed againstUniversal Fit: for most Cars, Vehicles, Trucks, Pickups, Automotive etc. Product Details: Color: Red Material: Silicone, Metal Inside Diameter: 8mm 0. 31"(D) Outside Diameter: 20mm 0. 79"(D) Length Size: 66mm 2. 60"(L) Wall Thickness: 5mm 0. 20"(T) Total Size: 66x20mm 2. 60"x0. 79"(L*D) Maximum Temperature Rating: 200deg Advantage: Silicone caps are designed to fit over your cooling system. The coolant cap is made of high temperature 3 layer polyester