Size: 75 x 62 x 22mm Weight: 150g Material: Ultra-lightweight aluminum alloy Color: Black Please refrain from purchasing if you are sensitive to minor scratches or scuffs, as this is an imported product from China. This is a universal type and can be attached anywhere with a Φ20-26mm pipe. It can be installed up to a maximum diameter of approximately 26mm. Comes with a spare key. The key and keyhole are a unique set, and even if the keys are from the same product, they will not work. It is recommended to create a spare if you lose one. This is an upgraded version that is lightweight, sturdy, and has an anti-theft structure, combining the best features. Packing details: Helmet lock body Keys x 2 Hex wrench Cushioning belt Japanese instruction manual #Helmet holder #Bicycle holder #Helmet lock #Helmet lock holder