MECCANIXITY 20Pcs Plastic Gears 15 Teeth Plastic Shaft Gears Model 152AA Reduction Gear for RC Car Model DIY Robot,White Module 0.5

What is this?Plastic Gears suit for a science DIY project such as rc model electric robot and windmill, education such as displaying how gear ratios work, and any other family small motor DIY project.What will I get?Model gear,Outside diameter:8.5mm/0.33 Inch;Shaft diameter:2mm/0.08 Inch;Thickness:5mm/0.2 Inch;Type:152A:Module:0.5;Teeth:15 Teeth ;Material:Plastic;Color:White;In the Package of: 20 x Plastic Gears;Are there any advantages of the product?Plastic gears are made of plastic material, it is durable, smooth, sturdy, and has a long service life.How to use it?It is easy and convenient to install and remove.What should I notice?Please check the size carefully before ordering.