4 pcs Rubber Vibration Isolator Mounts Shock Absorber with M6 x18mm Studs Rubber Mounts,Vibration Isolators Net Weight :0.2 lb Material : Metal, Rubber Rubber Size : 20 x 15mm = 0.78" x 0.58"(D*H) Male Thread Size : M6 x 18mm / M6 x 0.7" (Dx L) Total Size : 52mm x 20mm / 2" x 0.78"(H x D) 1.Durable, high durometer, resilient,anti-vibration, the metal stud is two pieces terminated and bonded within therubber that perform better isolation than go all the way through the rubber. 2.APPLICATION: Rubber mounts mainly used forFitness equipment, air conditioning, bicycle, air compressors, gasolineengines, water pumps ,Welding machine and other equipments as a damping element.