Anti-Vibration Rubber Isolator Mounts with Studs Shock Absorber, M8 Features Material: Metal + Rubber Weight: 260g(4pcs) Color: Black, Silver Tone Size: medium Thread Size(Approx): 8 x 23mm or 5/16" x 29/32" (Dia.* H(max)) Rubber Size(Approx): 44 x 32mm or 1 25/32" x 1 1/4" (Dia.*H(max)) Overall Height(Approx): 78mm or 3" Package Content: 4pcs Rubber Isolator Mounts with Nuts Specifications -The rubber isolator mounts is using cutting edge polymer technology meet and exceed OEM specifications -Composite material with natural rubber by innovative synthesis make the rubber mounts more efficient and durable -They absorb vibrations caused by appliances, reduces noise and structural damage caused by these vibrations -Adapt to many kinds of motors make machine more stable supports dynamic performance and stability -The metal stud is two pieces terminated and bonded within the rubber that perform better isolation than go all the way through the rubber