FEATURES-Gas O-Ring assortment kit-Graphite coated for long lasting performance-For Use With: Remington Model 1100, 11-87, Pro Bore Guns, G-3 models, Beretta Shotguns, Winchester Shotguns, Franchi Shotguns, Charles Daly Shotguns, Tri Star Shotguns, EAA Shotguns, and many other shotguns that use a gas o-ring-For 12ga., 20ga. or 28ga.PRODUCT SPECIFICATIONS:Dimension 1.05 X 3.65 X 7.80Height 1.0500Width 3.6500Length 7.8000OTHER FEATURES: COMES WITH 4-12 GA & 2-20 GA RINGS(20 GA FILL FIT MOST 28GA SHOTGUNS),GRAPHITE COATED FOR USE W/REMINGTON 1100,11-87 ,VERSAMAX,BERETTA,WINCHESTER, FRANCHI,CHARLES DALY,TRI STAR, EAA, AND MANY OTHERS THAT USE A GAS O-RINGNO DIRECT SHIP TO CALIFORNIA