Features Professional Made: 3D printer stepper motor comes with 0.42N.m high torsion and low self inductance reactance, responsive and has little system errors. Reliable Performance: This 42 step motor has small resistance, which increases the thermal conductivity for safe and stable work. Wide Applications: Can be applied to 3D printers, stage lighting, laser engraving, textile machinery, placement machine, etc. Premium Material: Combining high quality iron and brass materials, not likely to malfunction, the 3D printer stepper motor is very durable for long term use. Easy to Install: The 3D printer stepper motor is designed to have a light weight and a compact size, the installation is very convenient to complete. Specification: Item Type: 3D Printer Stepper Motor Screw Hole Spacing: 31mm / 1.22in Material: Iron, brass.  Step Angle: 1.8 Degrees Power Supply: 2 Phase 4 Lead Rated Current: 1A Rated Voltage: 4.5V Holding Torsion: 0.42N.m Lead Length: Approx. 90cm / 35.43in Shaft Diameter: Approx. 5mm / 0.2in Shaft Length: Approx. 24mm / 0.94in Package List: 1 x 3D Printer Stepper Motor 1 x Cable Package List 1 x 3D Printer Stepper Motor 1 x Cable