Features Good material: combination of high-quality iron and brass materials, anti-interference, very durable for long-term use. RELIABLE WORK Comes with 0.42Nm high torsion and low self-inductance reactance, reacts and has little system error. Wide usage: can be applied to 3D printers, stage lighting, laser engraving, textile machines, placement machines, etc. Safer Working This 42 step motor has a small resistance, which increases the thermal conductivity for safe and stable work. EASY TO INSTALL Designed to have a light weight and compact size, the installation is very convenient to complete. Specification: Item Type: Stepper Motor for 3D Printer Screw hole spacing: 31mm/1.22" Material: iron, brass. Step angle: 1.8 degrees. Power supply: 2 phase 4 cable. Rated current: 1A. Rated voltage: 4.5 V. Holding torsion: 0.42 Nm. Cable length: approx. 90 cm / 35.43 inches. Shaft diameter: approx. 5 mm. Shaft length: approx. 24mm Package list: 1 x Stepper Motor for 3D Printer 1 x cable. Package List 1 x 3D Printer Stepper Motor 1 x Cable