10T 0.6M 2.3mm Metal Motor Gear 7*7mm Pinion Spare Parts For 1/16 Heng Long RC Tank Model Universal spare parts for 1/16 scale Henglong tank model,it used on drive gearbox motor Shaft hole diameter is 2.3mm Modulus:0.6M Teeth numbers:10T Outer Diameter 7mm Height 7mm