Isolate It: Sorbothane Vibration Isolation Circular Pad 50 Duro (1" Thick 4" Dia.) - 4 Pack Reduce Vibration in Sensitive Equipment Supports between 140 and 275 lbs per pad Easy and quick to install Commercial Grade Sorbothane Anti-Vibration Pad Sorbothane Part number : 0534100 Durometer: 50 Shore OO