Allen-Bradley MPL-B430P-MJ72AA Bulletin MPL - Low-Inertia Brushless Servo Motors Product, 460 V, Frame Size 4 = 115 mm (4.53 in.), Stack Length 30 = 76.2 mm (3.0 in.), 5000 RPM, Multi-turn High-resolution Encoder (absolute feedback). Keyed Shaft Extension