The Browning Invector Plus Cylinder 20 Gauge Choke Tube is a replacement choke for Browning Invector-Plus shotguns. It's machined from 17-4 stainless steel for durability and corrosion resistance, and the Invector-Plus taper design helps keep shot patterns consistent. The flush-fit profile sits even with the end of the barrel, and a cylinder constriction gives an open pattern for close-range shooting. It's made only for Browning Invector-Plus systems, so it fits that platform properly.