Module 0.4 100 Teeth Gear

Module 0.4 100 Teeth Gear, a toy helicopter up and down gear

100T up gear size, in its boss (the middle convex part) there are two small holes that can be fixed with screws

100T down gear size，it has a U-shaped hole on one side, so the marked aperture is 5X4.4mm

100T up gear weight is 2.7g

100T down gear weight is 2.53g