10pcs Smart Car Toys Plastic Accessories For DIY Model 2mm Optical Axis

Features:

Best used for optical axis, car axle whose optical axis is 2mm
Application: Gearbox, Capstan, Deceleration pattern in bar

Specifications:

Material: Plastic
Size: 6*8mm (type#1); 6*6mm (type #2) Optional
Modulus: 0.5

Package included:

10 x Gear