Description: This type is micro Worm Gear DC Motor, which can change shaft rotation direction while the wiring positive and negative be changed With self-locking, the output shaft can not rotation when switch off, that is self-locking output shaft and motor shaft are come to be a rectangle The entire body of the motor output shaft relative to the general direction of gear motor short, widely adapted to some of the installation dimensions Widely used in household appliances, audio-visual products, office equipment, automatic facilities, intelligent systems, other industrial drives, etc Specification: Material: Aluminum Color: Silver Speed: 150RPM; 90RPM; 40RPM; 30RPM; 10RPM Size: Approx. Length: 73.5mm/2.89inch, height: 24.5mm/0.96inch, Screw: 50mm-M6 Package Includes: 1 piece Electric Worm Gear Motor Note: Please allow 1-3mm differs due to manual measurement Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.