Features:The rubber expansion plugs in 1-1/2" diameter that will fit holes from 1-1/2" to 1-5/8" (38mm-41mm) and resists heat, anti freeze. Good replacement for the old rubber expansion plug, rubber freeze plug and exhaust pressure test plug.Made of good strength rubber and metal, it is engineered for reliable performance.Tighten the nut and it expands the rubber to plug the hole.Easy to install and use.Specification:Material: Rubber, MetalColor: Black, Bronze TonePlug Type: Rubber Expansion PlugSize: 36x43mm / 1.42"x1.69"(L*D)Fit Hole Size: 1-1/2" to 1-5/8" (38mm-41mm)Note:Please check the size in the pictures and specification to see if it fits before purchasing.Package Includes:4pcs x Rubber Expansion Plug.