Brownells & Carlson's 3-Gun Extended Choke Tubes are designed specifically for use in 3-Gun competitions. This 3-piece choke tube set allows the shooter to select the exact choke tube needed for any stage. Included choke tubes are improved cylinder, light modified, and improved modified ensuring you can quickly take out clay pigeons or knock down that long distance steel target. The three tubes are manufactured from 1704 stainless steel and designed to throw tighter and denser patterns than conventional choke tubes. Each choke tube is knurled on the end to allow for quick and easy removal. Constriction and size are laser marked on the end and body f Mfg: Brownells SPECS: Construction - 1704 stainless steel. Finish - Matte black. Available for - Browning Invector and Winchester. 12 Gauge only. Includes the following choke tubes: Close Range - .720 Improved Cylinder. Mid-Range - .710 Modified. Long Range - .700 Full.