1、Aluminum alloy CNC fine engraving, anodizing ensuring maximum durability. 2、Fine workmanship keeps good performance, easy to use and long service life. 3、Excellent anti - crash performance, wonderful upgrade accessory. 4、Come with complete accessories for easy and convenient installation. 5、Protective wheel parts, special designed for RoboMaster S1 RC Car. Features: 1. Aluminum alloy CNC fine engraving, anodizing ensuring maximum durability. 2. Fine workmanship keeps good performance, easy to use and long service life. 3. Excellent anti - crash performance, wonderful upgrade accessory. 4. Come with complete accessories for easy and convenient installation. 5. Protective wheel parts, special designed for RoboMaster S1 RC Car. Specification: Item Type: Protective Wheel Material: CNC Aluminium Alloy, Stainless Steel Screw Color: Black Size: Approx. 7 * 2.15cm / 2.8 * 1.8in Weight: Approx. 75g / 2.64oz Package list: 2 * Protective Wheel 3 * Screw 1 * Wrench