Description
Eight gear ratios (7.5:1, 9.5:1, 15.7:1, 19.9:1, 32.9:1, 41.8:1, 79.0:1, 87.8:1) can be chosen for assembly. The gearbox case, gears, and crank are made from durable plastic material while the 3mm hex output shaft is made from metal. Furthermore, the gearbox case is transparent to enable viewing of internal mechanisms. Dimensions: (Width) 20mm, (Height) 18mm, (Length) 50mm.