FEATURES:-20 adjustments-Fits .750" diameter barrels-Inconel adjustment screw and spring-Made from carbon steel-Includes cross pin, set screws, and hex wrenchesPRODUCT SPECIFICATIONS:Dimension 1.75 X 3.45 X 7.35Height 1.7500Width 3.4500Length 7.3500TYPE/COLOR ADJUSTABLE GAS BLOCK 0.750"SIZE/FINISH BLACK NITRIDE STEELMATERIAL CARBON STEELAR-15 ACCESSORY YOTHER FEATURES: 20 ADJUSTMENT CLICKS, ADJUSTABLE FROM THE MUZZLE ENDNO DIRECT SHIP TO CALIFORNIA