HIGH QUALITY: The Magic Bullet is designed to handle difficult-to-chop foods, but after long periods of use, the base gear motor may wear out. This product is designed to fit Magic Bullet blenders. Made of plastic, rubber and metal. 4 Replacement Gears: 4 replacement gears, 2 base gears and 2 blade gears for your magic ball. Reverse Threaded: All Magic Bullet base gears are reverse threaded. Magic Bullet Blenders: This is a generic product designed to fit Magic Bullet blenders. Tools needed: Tools needed for replacement: screwdriver or wrench, thick cloth, a little oil for lubrication. Characteristics: Condition: new. Color: black and transparent. Materials: plastic, rubber and metal. Diameter: approx. 3 ~ 3.2 cm. Height: approximately 1 cm. Weight: approximately 34 g. For the Magic Bullet 250 W juice extractor. Contents: 2 basic gears. 2 rubber gears. Note: 1. Please allow 1-2cm error due to manual measurement. Thank you for your understanding. 2. Depending on the brightness and lighting settings of the displays, the actual color of the item may be slightly different from the photo. Please take the actual product as reference. Sold by the Bianco FR store