Infinite Product Solutions 1/2in Crush Washer Raw Stainless Steel. Specifications for Infinite Product Solutions 1/2in Crush Washer: Manufacturer: Infinite Product Solutions Fabric/Material: Stainless Steel Weight: 0.064 oz Width: 0.82 in Length: 0.82 in Caliber: .17 Hornady Magnum Rimfire 5.56x45mm NATO .22 Long Rifle 9mm Luger .223 Remington Height: 0.15 in Features of Infinite Product Solutions 1/2in Crush Washer Provides over 1 full rotation (360 degrees) for proper muzzle alignment Corrosion Resistant Package Contents: Infinite Product Solutions 1/2in Crush Washer Infinite Product Solutions 12-CW-SS: 1/2in Crush Washer Raw Stainless Steel