7ncmTop hhlhts · Voltage: 12VDC · Speed: 500 RPM · Torque: 7 Ncm · Shaft: 10 mm x 30mm · Dimension: 9 cm x 3.5 cm x 3.5 cm · Weht: 400 grams.This mini nema 11 bipolar stepper motor with step angle 1.8deg, short shaft 9.5mm and size 28x28x33mm. It has 4 wires and holding torque 7Ncm(9.91oz.in).