The vibco VS-320 silent Pneumatic turbine Vibrator features 160 lbs. Of Vibratory force, 6,800 vibrations per minute (VPM), and employs vibco's patented silent turbine Vibrator design. It has a built in exhaust Muffler and has a 2-bolt foot mount with 4” center-to-center mounting holes. The cast-iron housing is durable for harsh environments. Use this product to replace loud ball and piston-style vibrators that require lubricated air. Rated for continuous duty at 80 psi max, the vibco VS-320 is pre-lubricated for life, requires 60-80 psi of clean, dry air and consumes just 11 cfm, operating at just 69 db on a-scale at 1 meter. ; &use a filter regulator for optimum life and performance (sold separately). ;.