12mm DC 5V 56RPM Micro N20 Full Metal Gear Motor Gearbox Reducer DIY Robot Car,Gear Motor Gearbox Reducer DIY Robot Car 12mm DC 5V 56RPM Micro N20 Full Metal, We afford all cost if it's our fault, Weight: 9,5g, Output shaft length: 4,5mm,Motor size: 10 12 15mm(N20 motor), Gearbox size: 10 12mm, Gear Motor x 1pcs, Metal Gear Motor Gearbox Reducer DIY Robot Car 12mm DC 5V 56RPM Micro N20 Full.