Made of high quality 7075 aluminum alloy, which is different from ordinary aluminum alloy materials. Its strength is the best among aluminum materials. This bicycle hub nut is CNC fully automatic cutting technology, the edges fit tight, round and smooth. These wheel hub nuts are anodized for even more brilliant colors. Even if it is used for a long time in the rain, it is not easy to rust and the color will not fall off easily. This screw has non-slip thread, effectively prevents locking and slipping, and protects the gear frame, with shiny polishing treatment, high hardness, good abrasion resistance, uniform force. Easy to install, disassemble and replace, very necessary for mountain bike, road bike and so on. Various colors: This wheel hub nut is available in five colors (black, blue, red, gold, gray). You can choose according to your needs and the color of your bike. Size: 15 x 9 mm Note: Do not use this product on the extreme fable wheel. When installing, the torque should be regulated at 4nm, and the key must be fully inserted. Do not twist it hard to avoid damage to the screw. Description: Easy installation, suitable for fast bicycle bolts, for rear wheel fasteners for bicycles. The flange nut has a wide flange at one end, and can be used as a uniform non-rotating washer. Aluminum wheel nuts, light weight, high strength, corrosion resistance and durability. Mountain bike road bike fixed equipment DIY conversion accessories. Specification: Size: 9mm x 15mm. Material: 7075 aluminum alloy. Color: Black / Blue / Red / Gold / Titanium. Scope of delivery: 2 x wheel hub nuts.