For sale is a Dayton Model 4Z131B DC Gear-Motor with Attached Dart Model 253G-200E Variable Speed Drive. 1/20 HP. 16.5:1 Gearbox ratio. 109 RPM Top gearbox output speed. 5/8" Diameter keyed output shaft. Equipped with Dart Series 250, Model 253G-200E variable speed DC drive, 1/60/120V, Single phase AC input to drive, Standard 3-prong AC power cord and 2-3/4" Diameter chain-drive sprocket. NOTE: I have tested this motor and drive in my shop; the motor runs nice and quietly, and the drive functions very well. Ready to go!