This device is 40mm Stroke Micro Screw Slide Stepper Motor DC5V, 2-Phase 4-Wire Long Linear Actuator 8mm
Specification:
Model: 2-phase 4-wire Stepper Motor
Motor diameter: 8mm
Motor height: 6.5mm
Screw outer diameter: 1.5mm/ 2.0mm
Effective length of the screw: approx. 29mm.
Rated Voltage: 5V
Wiring not supplied.