Check the listing for details. 12mm Tire HEX Adapter For TAMIYA Grasshopper/Hornet/Frog/Wild One/Grasshopper 2. Color: Black, Condition: New. Listed at 18.88 USD. Features: 1. This aluminum 12mm wheel hex adapter is an excellent upgrade for Tamyia Grasshopper / Hornet / Frog / Wild One / Grasshopper 2.2. It is much stiffer than the standard stock parts, and offer more power transfer to the RC Cars.3. The center holes of the four wheel must be enlarged to 5mm.4. Extends the distance of the wheel and makes your car more stable and cool.5. Made of high quality aluminum material, novel appearance and exquisite workmanship.6. Easy to install and durable. Specification:Condition: 100% Brand NewItem Name: RC Car 12mm Tire Hex AdapterMaterial: Aluminum AlloyColor: BlackThickness: 15mm / 7.6mmHex Width: 12mmWeight: 15g SRB Chassis:#58496 Fast Attack Vehicle#58525 Wild One#58539 Fast Attack Vehicle -Shark#58354 The Frog#58336 The Hornet#58124 Super Hornet#58346 Grasshopper#47438 Super Storm Dragon#58643 Grasshopper 2 Packaged List:4 * RC 12mm Tire Hex Adapter2 * 10mm Bearing2 * 8mm Bearing2 * Suspension Pins Note: This upgrade parts are not original factory accessories for Tamiya, but fit for Tamiya Grasshopper/Hornet/Frog/Wild One RC Car.