106 piecescontains a variety of different types of gears, all of which can be matched with each other, the modulus is 0.5, and the inner holes are respectively
1.9mm, 2.05 (2.0) mm, 2.4 (2.55) mm, 2.9 (3) mm
[Modulus] 0.5M, can be freely matched
[Aperture] 0.8,1,1.9,2.05,2.55,3, etc. , etc.
[material] POM plastic