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Brownells & Carlson's 3-Gun Extended Choke Tubes are designed for use in 3-Gun competitions. This choke tube set contains three pieces that let you choose the exact choke tube you need for each stage. The set includes improved cylinder, light modified, and improved modified tubes to help you quickly take out clay pigeons or hit long distance steel targets. The three tubes are made of 1704 stainless steel and produce tighter and denser patterns than traditional choke tubes. Each tube is knurled on the end for easy removal and the constriction and size are laser marked on the end and body for easy reference. Remember to pattern your shotgun choke tube with the specific shot shell load you will use; different brands of ammunition produce different patterns from the same choke tube. This set is backed by Brownells & Carlson's lifetime warranty and is available for Browning Invector and Winchester 12 Gauge shotguns. Steel shot may be used with exceptional results, but do not use steel shot larger than BB or any steel load faster than 1550 FPS for Full or Extra Full Constrictions. Slugs, sabots, and rifled slugs should not be used in any choke constriction tighter than Improved Cylinder.