It is made to fit for Magic Bullet blenders only, NOT fit for any Nutribullet, Mini or Baby Bullet blender.2 gears for the Motor base and 2 Gears for under the blade.Notice: Please check the model before order to avoid buying the wrong part.The part is a food processing device that performs tasks such as blending freeze drinks, making pasta sauce, chopping fruits & vegetables or grinding coffee beans. It is designed to handle hard-to-chop foods, but after long periods of use, the motor in the base gear can wear out.Name: Transmission wheelColour: blackMaterial: plasticPackage Contents:2 x black rubber wheels2 x transparent wheelsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.