ITEM NAME:80Pcs Plastic DIY Robot Gear Set Single Double Layer R3P1 Crown Sleev Shaft F7K9 Description&Preview.Spindle straight tooth 9 styles. TEE Axle sleeve 1 piece. Crown gear 11 styles. Double Layer gear 19 styles. Single Layer gear 12 styles. Axle sleeve 6 piece. You can follow below process to chontact us.