Rchobbytop 4PCS RC Wheel Hubs 12mm Turn 17mm Hex Adapter Nuts 30mm Extension for 1:10 Scale Monster Truck SCT Buggy Off Road Cars Upgrade 1:8 Wheels, Black

Material: Hex Adapter and lock nut: aluminum alloy, anodized finish. Hex bolt: Steel Applications: This 12mm to 17mm hex adapter conversion is for 1/10 scale vehicles to run with 1/8 wheels and tires. Package Included: 4×Wheel Hub Adapter 4×Wheel Nut 4×Hex Bolt 1×Wrench