Tubular Motor DM45S50 120V 60Hz, 50 NM, 13 Rpm. Motor diameter size 45 mm, motor length 21.5 inches. Lift Capacity: Octagonal Tube 60mm 246 Lbs Octagonal 70mm 224 Lbs It comes with 2 brackets, 1 crown 60 or 70 mm, 1 drive adapter 60 or 70 mm 1 limits adjuster stick.