Spindle straight tooth gear 122A 0.5 module 12 teeth 1.95MM hole inner diameter motor car model motor gear parts (4pcs)

122A gear: 12 teeth, 2A means it fits tightly with a shaft with a diameter of 2MM. The hole diameter is about 1.95 mm
0.5 means module, the module of this gear is 0.5
Calculation formula of outer diameter of gear: Outer diameter = (number of teeth 2) * 0.5

142A gear
Hole diameter: 1.95mm
Diameter: 7mm
Height: 5mm