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: New Color: Black and transparent Material: Plastic, rubber and metal Gear Base Size(D * H): Approx. 3.7 * 1.1cm / 1.46 * 0.43in Rubber Gear Size(D * H): Approx. 3 * 1cm / 1.18 * 0.39in Weight: Approx. 48g For Magic Bullet 250W juicer Package Includes: 2 x base gears 3 x blade gears Note: 1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.