Hign-concerned Chemical:None Color:Black Origin:Mainland China Description: Premium material: This helmet lock is made of premium aluminum alloy material, which ensures the durability. Fine Workmanship: This helmet lock is quite long-lasting due to its fine workmanship. Rustproof: This helmet lock comes with a rustproof feature due to its aluminum alloy structure. Compact Size: This helmet lock comes with a compact size, which will not take off a lot of spaces. Motorbike Supplies: This helmet lock is a good choice as motorbike supplies due to its practical function. Specification: Material: Aluminum Alloy. Size: Approx. 7.6*6.5CM/3*2.55inches. Color: As shown. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Helmet Lock. 2 Pieces Keys. 2 Pieces Screws.