4 Rubber Vibration Isolator Mounts (1" Dia x 1/2'' Thk) 1/4-20 x 1/2" Long Stud These rubber isolation mounts measure 1-1/2" total length from top to bottom. These mounts measure 1/2" in thickness (rubber height) and 1" in diameter (rubber diameter) Both studs are 1/2" Long with 1/4-20 threads. Provides excellent noise and vibration reduction. Package Includes: 4 Isolation rubber mounts Can be used on/in: Water pumps Construction Automobile Electronic components Medical equipment Home appliance Mechanical equipment Office facilities Aviation Air compressors Diesel engines Gasoline engines and may more applications