Features 1、APPLICATION SCENARIO: Guide rail strip is ideal for connecting lights, lasers, optics, bipods, and front grips 2、LIGHTWEIGHT AND CORROSION RESISTANT: Made of excellent material, black anodized matte finish, includes mounting screws and tools 3、PORTABLE AND CONVENIENT: Guide rail strip is small and exquisite, easy to carry, support quick installation, easy to use 4、PRODUCT USE: Guide rail decoration accessories, suitable for mounting accessories, such as feet, mirrors, lights, lasers and so on 5、4 SIZES: Made of high strength polymer, the 20mm track is available in four different sizes to meet your different usage needs Specification Item Type: Guide Rail Strip Product Material: Nylon plastic Product Specification: Black Product Length: 5 Slots: Approx. 6.5cm / 2.56in, 7 Slots: Approx. 8.5cm / 3.35in, 9 Slots: Approx. 10.5cm / 4.13in, 11 Slots: Approx. 12.5cm / 4.92in Product Use: Guide rail decoration accessories Package List 4 x Guide Rail Strip 8 x Gasket 8 x Screw 1 x Hex Wrench