20Pcs Worm Gears, Bettomshin 8x2x4.5mm/0.31×0.08×0.18

Bettomshin Plastic Gear Description: 1.This is a plastic gear building your own gearbox with customized gear ratio. 2.Ideal accessories for science DIY projec or remote control, such as RC airplane ,RC helicopter,modle car and so on. Specification: Product model: 142A Material: Plastic Number of teeth:14 Modulus: 0.5 Modulus Outside Diameter: 8 mm /0.31 inch Shaft Diameter: 2mm / 0.08 inch Thickness: 4.5mm/0.18 inch Package Content: 20pcs x Plastic Gear