If you are looking for professional and stepper motors, your research is here. That's because our products can meet your needs. Made of steel, practical and durable, it can be used for a long time. It is easy to use and brings you of convenience. Features - Color: Black+silver. - Material: Resin+steel. - Size: 4.20X4.20X4.50cm/1.65X1.65X1.77in. - Rated voltage: 4.1V. - Rated current: 1.0A. - Insulation resistance: >=100M. - Insulation class: . - Made of high-grade steel material to ensure safety and can be used with confidence. - Small size and reasonable weight, save space, easy to store, won't take up too much space. - Easy to install in narrow working spaces. Great for you to use to replace your old 42 phase stepper motors. - Before testing the motor, make sure the motor is connected to a constant current or chopper drive controller. - Connecting the motor directly to the power supply will damage the motor. Please use with care. Package list: 5 x Stepper Motor