aluminum alloy material: flat height is 0.5 inches. The riser rail frame is made from solid aluminum alloy, providing a lightweight yet durable structure that remains stable in a variety of environments. Precise installation design: securely secured to the base with two screws, effectively preventing front and rear displacement to keep your optic or accessories consistently accurate. Universal compatibility: compatible with all 20mm Weaver/Picatinny rails, suitable for a wide range of equipment and easy to or install at any time. Simple black look: full matte black coating delivers a lowprofile appearance and coordinates well with the device it is paired with. Use scenarios: Mount a red dot sight or other optic on an ARstyle platform for fast target acquisition in sport shooting or field use, while maintaining reliable alignment. Attach backup iron sights, magnifiers, or other accessories on 20mm rails without sacrificing stability or position accuracy. Ideal for airsoft, training, or range practice where a durable, repeatable mounting solution on 20mm rails is required.