Features: The 42-34 T8 stepper motor is good quality, low noise uniform speed; 3D Printer Parts screw motor T8x8 Lead Screw kit,1.0A 28N Screw Rod Linear 17HS4034 Servo Motor with Lead Screw Stable performances and low noise leve; Significantly reduces vibration and noise when the engine is running, reduces your anxiety and does not affect the rest of your family The stepper motor with low noise and efficient heat dissipation has the great torque and high precisions Specifications: Name: 42-34 T8 Motor Phase inductance: approx 5.4mh Step Angle Distance: 1.8deg Length: approx 415mm/16.34in Holding torque: 0.28N.m Phase current: DC1.0A Screw specification: TR8X8 Package Includes: 1PC 17HS4034 Motor with T8x8 Lead Screw note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.