4 Rubber Vibration Isolator Mounts (1" Diameter x 3/4" Height) 5/16-18 x 3/8" Long Stud These mounts measure 1" in diameter (rubber diameter) and 3/4" in height (rubber height)Stud is 3/8" long with 5/16-18 female and male threads.Provides excellent noise and vibration reduction.Package Includes:4 Isolation rubber mountsCan be used on/in:Water pumpsConstructionAutomobileElectronic componentsMedical equipmentHome applianceMechanical equipmentOffice facilitiesAviationAir compressorsDiesel enginesGasoline enginesand may more applications