7-Size: You will receive 7 sizes of freeze plugs, 1-1/2 inch for 38-41mm hole, 1-3/8 inch for 34-38mm hole, 1-1/4 inch for 31-34mm hole, 1-1/8 inch for 28-31mm hole, 1 inch for 25-28mm hole, 7/8 inch for 22-25mm hole, 3/4 inch for 19-22mm hole, check size carefully before purchase

Sturdy Structure: The expansion plug is a six-layer structure consisting of iron frame bolt, o-ring seals, iron chassis, rubber gasket, center opening tin, and hexagonal nut from the bottom up, which is a sturdy and precise structural design to provide an effective seal

Multi-function Use: Rubber plugs widely used in replacement of rubber freeze plugs/rubber expansion plugs/muffler pressure test plugs, provide certain cushion, avoid water tanks, engines and other containers inside the pressure rise and damage to engine oil port and surrounding parts

Durable Rubber: Freeze plugs made of rubber, high elasticity and flexibility, closely fit the hole, good sealing effect, high temperature resistance, withstand impact of high temperature and pressure and keep stable performance, high strength galvanized iron, not easy to damage and rust

Easy to Install: Before installation, clean the oil port area without sand and dust, next dismantle the old damaged rubber expansion plug, install our plug directly in the original position, and finally tighten the hexagonal nut at the top to complete the installation