Pneumatic Piston Vibrator, Force 397 Lb, Continuous Duty, Max Material in Bin 3970 Lb, CFM @ 80 PSI 7.1, VPM @ 80 PSI 3500, Speed @ 80 PSI 3500 RPM, 91 dB @ 80 PSI, -4F - 390F Max Temp, Inlet Port 1/4 NPT In, Outlet Port 1/4 BSPP In, Muffler Included, Any Position Mounting, Lubrication Required