Stable performance Easy to useFine workmanship and durable in useMiniature remote control car upgrade partsHigh grip tires designed for various rock chains and trucksApplicable for: S911 / 9115 S912 / 9116 remote control car accessoriesMaterial:plasticcolour:blackPackage Contents:4 x Universal Joint CupOnly the above package content, other products are not included.Note: Light shooting 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.