Package contains: 1 (one) motor base gear replacement; 1 (one) rubber blade gear replacement. Replacing the base gear: Please remember: The Base Gear is reverse threaded. To remove your broken piece for BASE: Use a flat screw driver at the bottom center of the power base and turn gear on top clockwise with vise grip and protective cloth. To remove your broken piece FOR BLADE: Turn rubber gear clockwise while holding the blade steady. Compatible with Magic Bullet blender models MB1001, MB1001B and MB1001C. NOT COMPATIBLE with Nutri Ninja, NutriBullet or Baby Bullet blenders. Disclaimer: Not an OEM product. This is not a Magic Bullet original product. This is a generic replacement part compatible with Magic Bullet. Any use of the Magic Bullet brand name, model or part designation for this product is made solely for purposes of demonstrating compatibility.