RAPP-IT Precipitator Vibrators (pneumatic rapper vibrators) keep plates, wires, and electrodes clean to maximize collection efficiency and minimize stack emissions. The RAPP-IT pneumatic precipitator rapper vibrator features a Tefkote bore for lubrication-free operation. The 3-18 piston is air-cushioned at the top of the RAPP-IT, eliminating stress on the head plate. With an industry standard 330 taper mount, the RAPP-IT is an off the shelf replacement rapper for any tapered transmission shaft application.