FOR NEMA 17 bipolar 1.65 inch x 1.65 inch x 0.79 inch 4-wire This is a short height bipolar NEMA 17 stepper motor with a 1.8 deg. step angle (200 steps/revolution). Each phase draws 1A current, providing a holding torque of 13 Ncm (18.4 oz.in). Manufacturer Part Number: 17HS08-1004S Motor Type: Bipolar Stepper Step Angle: 1.8 deg. Rated Current/Phase: 1.0 A Phase Resistance: 3.5 ohms Inductance: 4.5 mH +/- 20% (1 kHz) Frame Size: 42 x 42 mm Body Length: 20 mm Shaft Diameter: 5 mm Shaft Length: 20 mm D-cut Length: 16.5 mm Number of Leads: 4 Lead Length: 400 mm Weight: 140 g Connection: Black (A+), Green (A-), Red (B+), Blue (B-) Warning: Ensure the motor is connected to a constant current or chopper drive controller before testing. Connecting the motor directly to a power supply will damage the motor. Color: Silver Material: Metal Size: 42 x 42 mm Package Contents: 2 x Stepper Motor Note: Light shooting and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by +/- 1-3 cm.