The WMD Low Profile Gas Block features a .750" inside diameter and is completely coated with NiB-X coating both inside and out for superior durability and performance.WMD Low Profile Gas Block.750" port size for standard barrel compatibilityNiB-X coating inside and out for enhanced corrosion resistanceLow profile design for streamlined appearanceIncludes set screws for secure assemblyEngineered for reliable gas system operation with enhanced protection against wear and corrosion making it ideal for both recreational and professional firearm builds.