80Pcs Rubber Tube Cap Intake Manifold Vacuum Fitting Protective End Cap

This t hread p rotector is made of solid material, which can withstand long-lasting use. Features the rubber material, which has high durability, not easy to deform. -Suitable for use on all types of cylinders, oil cylinders, tap screws, round pipes, PVC pipes, valves, and more.

eBay