Carlson's Extended Waterfowl Choke Tubes for 12 Gauge shotguns are expertly crafted from durable 17-4 stainless steel offering superior performance for waterfowl hunters. Designed to deliver tighter and denser patterns these choke tubes feature a 25% longer parallel section for unmatched consistency. The knurled end allows for quick and easy removal while the laser-marked constriction and size ensure effortless identification. Compatible with steel lead and non-toxic shot they provide exceptional results when used within recommended guidelines. These extended choke tubes are finished in sleek black and are configured for Benelli Crio shotguns making them a reliable and effective choice for your hunting needs.