58 styles Plastic Gears Cog Wheels All The Module 0.5 Robot Parts DIY Accessory brand new and high quality A - Means tight Match(will small 0.05mm than standard) B - Means loose Match(will larger 0.05mm than Standard) Gear Diameter : (Teeth +2) x modulus = Diameter of Gear Modulus: 0.5 Aperture 1.5/2/2.5/3 Spindle gear(9 styles): 8-1.5A 9-2A 8-2A 10-2A 12-2A 14-2A 16-2A 18-2.5A 18-3A Crown tooth(10 styles): C20-2.5A C20-2A C20-3A C2410-2A C2410-2B C2810-2B C28-2A C3010-2B C30-3A C3610-2B Single Gear(18 styles): 20-2A 26-2A 24-2.5A 28-2A 30-2A 36-2A 38-2A 38-3A 40-2A 42-2A 44-2A 44-2.5A 46-2.5A 48-2A 50-3A 52-2.5A 56-2A 56-3A Double gear(18 styles): 1810-2A 4812-2.5A 2210-2B 2410-2B 2610-2B 2808-2B 4610-2B 2810-2B 3010-2B 3210-2B 3212-2B 3412-2B 3610-2B 3808-2B 4410-2B 4810-2B 5010-2B 5610-2A Worm Gear(2 styles): 6 x 6-2A 6 x 8-2A Pulley Gear(1 styles): 6x6-2A Material:Plastic Color:White Quantity: 1set(58 styles) Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1set(58 styles) x Plastic Gears All The Module 0.5(other accessories demo in the picture is not included.)