Package Content: You will receive4pcsM8 bike nuts for wheels, 4pcsM9.5bike nuts, 4pcs M10 bike nuts, 8pcs 10mm / 0.39inch bike safety washers and 4pcs8mm/ 0.33inch bike safety washers. All of them are packaged in a plastic box and are convenient for you to store and carry. Different sizes and enough quantities can meet your needs in replacingbike wheel axle nut. Product Size: M8: 0.6inch/1.5cm in outer diameter, 0.31inch/0.8cm in inner diameter, 0.28inch/0.7cm in height;M9.5: 0.75inch/1.9cm in outer diameter, 0.4inch/1cm in inner diameter, 0.36inch/0.9cm in height;M10: 0.71inch/1.8cm in outer diameter, 0.4inch/1cm in inner diameter, 0.31inch/0.8cm in height. Safety washers: 0.39inch/1.0cm and 0.33inch/0.8cm respectively. Important Tips: Please measure the size of the bicycle wheel axle carefully before buying. You can use the paper to mark the size of the axle and then measure the circumference of the axle, or use a caliper to measure the diameter. Premium Material: Bike wheel nut and washer kit is made of high-quality carbon steel, super sturdy and very durable, not easy to break and deform. Besides, Bike wheel nut and washer kit is well-polished,so it is smooth while using. Suitable for: various bikes and bicycles in different types, such as road bikes, mountain bikes, folding bikes, flatbed bikes, kids bikes, regular bikes, etc. For example, front and rear axles of the mountain bike use M10 nuts while the front axles of the kids and women's bikes use M8 nuts and the rear axles of them use M10 nuts.