CARBON STEEL CONSTRUCTION. WITH ANTI-SHEAR INLET ADAPTER PLATE. 3" O.D. BLOW THRU PIPE. OPEN ENDED, DEEP POCKET, FIXED TIP ROTOR. 1/2 HP ELECTRO DRIVE MOTOR, 1700 RPM , 230/460 VOLT. OPPERMAN MASTERGEAR IN-LINE GEAR REDUCER, 50:1 RATIO. CHAIN DRIVE (PARTIAL GUARD).