The Magic Bullet is designed to handle hard-to-chop foods, but after long periods of use, the motor in the base gear can wear out. This product is made to fit Magic Bullet blenders. Made of plastic, rubber and metal. 5 replacement gears, 2 base gears and 3 blade gears For your magic bullet.Features:Made of plastic, rubber and metal material. This product is made to fit Magic Bullet blenders. 5 replacement gears, 2 base gears and 3 blade gears For your magic bullet. All base gear in Magic bullet are reverse threaded. Tools required For replacement: a screw driver or wrench, a thick cloth, some oil For lubrication. Specifications:Condition: Color: Black and transparentMaterial: Plastic, rubber and metal Gear Base Size(D * H): Approx. 3.7 * 1.1cm / 1.46 * 0.43inRubber Gear Size(D * H): Approx. 3 * 1cm / 1.18 * 0.39inWeight: Approx. 48gFor Magic Bullet 250W juicerPackage Includes:2 x base gears3 x blade gears