Tonson angle bung entry air mixer equipped with high torque radial piston drive air motor, stainless steel shaft and two collapsible polished stainless impellers is ideal for mining low to medium viscosity materials in closed drums. Impellers fit through and the unit simply screws into a 2” bung opening on steel drums allowing quick installation and optimal operating angles. Blades extend by centrifugal force when operating and retract when stopped. Specifications may be customized. More info: Tonson Air Motors Manufacturing Corp., 886-22611047; Fax: 886-4-22611678; E-mail: firstname.lastname@example.org; Web: www.tonson-motor.com.