Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Suitable for wide range, mountain bikes, electric vehicles, , motorcycles, cars can be used (applicable tires with a thickness of 10mm or more, such as off-road tires, run-flat tires. Normal road tires cannot be used). Before buying, measure the thickness of the tire and buy steel nails of appropriate length to avoid puncturing the tire. Choose the dosage according to the tire type and size Dosage reference: 8.5 inch scooter is recommended to be 100PCS/unit Colour: silver Material: steel Size: 4 x 12mm Package Contents: 100 x Tire snow studs 1 x Installation tool Only the above package content, other products are not included. Note: Light reflection 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.