Browning Choke Tube Browning Invector Plus 12 Gauge Features: - Invector-Plus tubes are available in constrictions ranging from Cylinder to Extra-Full - Longer choke taper inside Invector-Plus choke tubes for use with back-bored barrels - Produces excellent patterns with excellent uniform densities - All Browning tubes are set to industry constriction standards - Flush fit does not extend beyond end of barrel - Constructed of highly polished, 17-4 stainless steel for the ultimate in performance and durability Specifications: - Invector Plus - Full - Material: 17-4 Stainless Steel - Color: Stainless Steel - Pockets: Stainless - Choke Gauge: 12 - Choke Pattern Percentage: 55%-85% - Choke Notches: I - Weight: 3. 2 oz