Hign-concerned Chemical:None Color:Black Origin:Mainland China Feature 1100% brand new and high quality,easy to install. 2A selection of high quality stainless steel materials makes the lock more durable. 3Small volume, standardized design, Avoid adding unnecessary weight and easy to install. 4Versatile product for Honda / Suzuki / Kawasaki / Yamaha. 5Lock the 2 helmets on the motorcycle pole and through the D-ring of the helmet strap.Reduce scratches and cuts in helmet paint. Let the helmet hang freely. Specifications: Condition: Brand New Material: Stainless Steel Optional color: Silver,Black Quantity: 1 piece Package Weight: Approx. 59g / 2.1oz External Size: Approx. 8.9 x 3.0cm / 3.5 x 1.2in Hole diameter: 1.3cm / 0.5in Fitment: Universal Package List: 1 * Pair of Helmet Strap D-Ring Lock Note: 1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 2. Easy to install, but professional installation is highly recommended.