The C&H Precision plates are designed, manufactured and shipped from CH Precision's small family owned business in Coastal Georgia. Each plate is precision machined to the tightest tolerances on HAAS CNC machines and each plate goes through multiple quality checks before shipping to customers. Thickness: V4 MIL / LEO Plates are .095 to .099 thick Material: Plates are made from 6061 aluminum. All mounting hardware is Stainless Steel Finish: Plates are MIL-SPEC Type III Hard Anodized Black INCLUDED: Qty 1 Optic Plate Qty 2 M4 Plate Mounting Screws