Material: aluminum alloy_x000D_Length: 85mm_x000D_Colour: Black 11. Dimension and weight: Low Profile: 0.5" Saddle Height - 8 Slots / 3.35" Length; Weight: 2.8 oz with 1 Allen Key. 22. Made of high-grade aluminum alloy and matte black anodized, the 20mm rail bracket is lightweight, durable, and rust-proof. 33. This Picatinny rail mount is designed with 8-slot 3.35" long rails, allowing you to add any standard Picatinny or braided accessories, perfect for mounting scopes, optics, and red dot sights, flashlights, or other accessories. 44. There are 2 lock nuts and cross bolts on the side, which can be quickly and easily installed and removed anytime and anywhere without any auxiliary tools. 55. Package content: 1*Riser bracket, 1*Allen key.