Features: 1. Applicable: Adapted To Fast Helmets, Using Matching Screws, Can Be Installed On Fast Helmets. 2. : The Rails Are Beautifully Made And Fit Perfectly With The Helmet. 3. Easy Installation: Use The Matching Screws And Nuts To Connect The Helmet To The Rail. 4. Waterproof: The Side Rails Are Waterproof And Have Strong Weather Resistance. 5. Multi-Function Rail; Helmet Accessories 1. Name: Helmet Rail Accessories 2. Applicable Gender: Male, Female, Neutral/Both Male And Female Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Material: 2-nylon colour: C-Black Package Contents: 4 x Helmet Rails 2 x Lanyard 2 Set Screw Mounting Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.