This Mason NK4X4 vibration isolation pad is a multi-layered acoustical pad for reducing high frequency noise and minor vibration from lightweight machines. On each side is a neoprene pad for oil resistance and to provide a non-skid surface, with no bolting necessary. The waffle pattern forms a self-sealing perimeter to protect the material from oil or fluid. The cork center provides differing densities so that sound waves moving through the pad will change velocity, resulting in a power loss. The pad is 4 x 4 x 1 inches/102 x 102 x 25 mm (W x L x T) and has a maximum load capacity of 50 pounds per square inch (psi). (W is the horizontal distance from left to right, L is the horizontal distance from front to back, T is the thickness from top to bottom.) These Mason acoustical pads are suitable for use with small compressors, pumps, drill presses, and generators.

Shock and vibration control products (absorbers, mounts, and pads) reduce air and structure-borne dissonance by either blocking or absorbing sound waves, or damping or isolating vibrations that cause them.  Shock absorbers, vibration damping mounts, and vibration damping pads can extend equipment life and help protect work environments, and they are most commonly used in heating, ventilation, and air conditioning (HVAC) systems or in other large machinery operations. Weight distribution determines the number of mounts or pads needed. If evenly distributed, the maximum load capacity per mount or pad should equal the total weight of the machine divided by the number of mounting points available.

Mason Industries manufactures noise reduction, vibration isolation, and seismic restraint control products such as mountings, hangers, and flexible connectors for mechanical equipment. The company, founded in 1958, is headquartered in Hauppauge, NY.