Tactical Helmet Side Rail Mount Adapter 19mm 360 Degree Rotation Helmet Guide Durable Military Fast Helmet ARC Guide Rail Mount Specifications: Name:ARC Helmet Guide Material:Nylon Color:black/tan/green/grey Size:4.6*3*1.7cm Weight:about 0.02kg Features: 1.Durable nylon material,strong and wear-resistant. 2.Suit for 19mm guide rail. 3.Can rotate 360 degress. Package contents: guide*2 / allen wrench*1 1) , , TT. All major credit cards are accepted through secure payment . 2) The buyer is responsible for any tax or duty charged by their country. 3) If you have any special requirements about your order, please contact with us before payment, or we will use the default packages. 1) We provide different shipment service for different request as follow: China post air mail, Shipping, Epacket, EMS, FEDEX / DHL / UPS / TNT / TOLL, 2) We ship 6 days a week, except for Saturday and holidays. 3) After we sent it we will provide the tracking number fro you. 4) We hope the arrival of your item is timely,but since it is an international delivery,shipping time is highly dependent on courier companies and local customs duties. 1) If the item you received is unacceptably defective, broken, or out of order, please notify us as soon as possible. 2) We offer free replace or full refund to you, if the product has any quality problem. 3) We promise send you high quality goods with high protective parcel. But it is a long travel to delivered, anythingwill happened during shipping. If you have any problem about your goods, contact us at the first time, we willdo our best to solve the problem. Thank you! Your feedback is very important to us! Please give me five stars feedback. If there are any problems, please feel free to contact us, we will do my best to solve your problem.