Sorbothane® Mounts absorb (57% absorption efficiency) and dissipate energy (70% specific damping). The mounts reduce vibration to other components by isolating the vibrations within the material while absorbing multi-directional forces. These hemisphere mounts can stabilize equipment weighing up to 38 pounds (hemisphere mounts), 65 pounds (¼-20 male bumper mounts), or 29.4 kg (M6 male bumper mounts). Sorbothane® Mounts measure 50mm dia. (top) x 26mm thick. The top side of the hemisphere is tacky, while the other side is felt. ¼-20 or M6 male bumper mounts measure 38.1mm dia. x 25.4mm thick. The threaded screw measures 12mm long. All models have a hardness durometer value of 70. Each package contains 4 mounts.