100% Original and Goo d Quality with Free After-sale Warranty . Size:30mm diameter whole piece and approximately 4mm diameter internal screw hole High Quality:Motor top base gearis made of High quality plastic,blade base gear is made of quality rubber,These components are compatible with Magic Bullet MB1001 250W only for safety and durability. color:Black + transparent Material:Plastic + Rubber Package Contents: 8 x rubber gears for under the blade 4 x plastic gears for the Motor base Only the above package content, other products are not included. Note: Light reflection 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.