We supply discount for big quantity. Welcome to touch with us! MODEL NUMBER - Vitamix Drive Socket Kit - 891. DURABLE & STRONG - The kit is fabricated from top rate supplies and strict exams were played for long lasting use. You needn't fear about replacing it frequently, saving your time and the upkeep cost. COMPATIBLITY - The strength socket couples the motor to the blade assembly and protects the motor if the blade meeting is blocked from rotating. This replacement energy socket kit isn't for use with the Vitamix XL. EASY TO INSTALL - It will take you about 10 mins to change the recent energy socket kit. DIY installation, full of accomplishment. size:Approximately 4 in diameter Material:plastic colour:black Package Contents: 1 x Drive Socket 1 x Hex wrench Only the above kit content, other products usually are not included. Note: Light taking pictures and assorted reveals may cause the color of the thing in the photograph a piece assorted from the real thing. The size allowed error is +/- 1-3cm.