uxcell&reg; 20mm x 2mm Screw Shaft 2 Phase 4 Wire Micro-Step Stepper Motor DC 3-6V Product Name : Stepper Motor;Material : Metal Motor Body Size : 6 x 8mm / 0.24" x 0.3"(D*L);Screw Length : 20mm / 0.8" Screw Rod Dia : 2mm / 0.08";Drive Voltage : DC 3-6V Color : Silver Tone;Weight : 2g Package Content : 1 xStepper Motor