Carlson's Sporting Clay Improved Cylinder Choke Tube for 12 ga Ruger .730 SPECIFICATIONS BRAND: CARLSON'S BRAND FAMILY: SPORTING CLAYS CA PROP 65: YES CA PROP 65 CHEMICAL: VINYL CHLORIDE CHOKE DIAMETER: .730 COLOR: SILVER GAUGE: 12 GA WEAPON MFG: RUGER DESCRIPTION Carlson's Sporting Clays Choke Tubes are made from 17-4 stainless and precision machined to produce a choke tube that patterns better than standard choke tubes. These choke tubes feature a 25% larger parallel section in the choke thus throwing more consistent patterns than conventional choke tubes. Each choke tube is knurled on the end to allow for quick and easy removal. Each choke tube has the constriction laser marked on the end for easy reference. These choke tubes are backed by Carlson's lifetime warranty. Lead shot, Steel Shot, Copperplated Shot, Nickel Shot, Hevi-Shotshells, and Buck Shot can be used in Carlson's Sporting Clay Choke Tubes. Steel shot larger than BBS should not be used in any Sporting Clays Choke Tube tighter than Full Constriction. Carlson's Sporting Clays Choke Tubes will throw tighter/denser patterns than Flush Mount Choke Tubes due to a longer parallel section. Fits Ruger Long Style Chokes manufactured after 1993