Features 1、Made of high quality plastic, wearable and long service life 2、The products are for toys gear spare parts, suitable for DIY model technology production 3、Small parts, easy to use, great model making accessories for all kinds of cars, robots, etc 4、This is the gear set including 12 kinds of gear parts. It can meet your DIY needs 5、242A for example means teeth number is 24, aperture diameter is about 2 mm and A means close-fitting 2 mm shaft Specification Description: If you are a model amateur, you would know that gears are essential and necessary parts for models. Aircraft, automobiles, boats, robots and other small production of science and technology will all need to use gears. Here we provide 12pcs gears of different sizes which may meet your basic needs for model making. They are also good replacement parts of old or broken gears. Features: Made of high quality plastic, wearable and long service life. The products are for toys gear spare parts, suitable for DIY model technology production. Small parts, easy to use, great model making accessories for all kinds of cars, robots, etc. This is the gear set including 12 kinds of gear parts. It can meet your DIY needs. 242A for example means teeth number is 24, aperture diameter is about 2 mm and A means close-fitting 2 mm shaft. Specifications: Material: Plastic Color: White Modulus: 0.5 Type: 202A,242A,282A,302A,303A,302.5A,322A,362A,402A,422A,482A,562A Weight: 7g(approx.) Size: d(mm) D1(mm) D2(mm) D3(mm) H1(mm) H2(mm) H3(mm) 202A 1.95 11 4.4 3.5 1.5 2.6 0.4 242A 1.95 13 5 4 1.5 2.4 0.1 282A 1.95 15 5 4 1.5 2.3 0.2 302A 1.95 16 5 4 1.5 2.1 0.4 303A 2.95 16 5 4 1.5 2.2 0.4 302.5A 2.45 16 5 4 1.5 2.1 0.5 322A 1.95 17 4.8 3.9 1.5 2 0.7 362A 1.95 19 5 4 1.4 2 0.4 402A 1.95 21 4.9 3.9 1.5 2.1 0.4 422A 1.95 22 5 5 1.5 1.9 0.2 482A 1.95 25 5.9 5 1.5 2.4 0.5 562A 1.95 29 5.9 4.9 1.6 2.7 0.3 Package Includes: 12pcs x Gears Package List