CHANCS TYC-50 Synchronous Gear Motor 110V AC 17-20RPM CW/CCW Torque 4W Electric Motor Working Voltage: AC 110-127V Speed: 17/20r/min Shaft Length: 16mm;Shaft Diameter: 7mm Shaft Rotation: CW/CCW (UNCONTROLLABLE) GuaranteeAny quanlity problem,we guarantee 100% unconditional refund or resend service.