DIY 81 Pieces Plastic Gear Set
contains many different types of gears, all of which can coincide with each other. The modulus is 0.5. The inner holes are 1.9mm, 2.05(2.0)mm, 2.4(2.55)mm, 2.9(3)mm, etc.
[Modulus] 0.5M, can be freely matched
[Aperture] 0.8,1,1.9,2.05,2.55,3, etc. , etc.
[Material] POM plastic