12GA CHOKE TUBE FULL FEATURES-12 gauge-Full-Nickel chrome moly-Extends beyond end of barrel for easy removal and even tighter patterns-Proprietary differential banded gas seal eliminates residue build up and makes chokes easy to remove and install-Integrated spring suspension holds the seal tight, yet allows expansion against the barrel wall for a perfect fit and a smooth transition for the shot column entering the choke-Gas is controlled at the interface between choke and where it seats in the bore-From skeet to full choke, patterns tighten consistently and reliablytable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Dimension: 1.20 X 4.70 X 8.70 Gauge: 12GA Choke: FULL Flush Or Extended: EXTENDED Material: STAINLESS STEEL Thread Pattern: INVECTOR DS Other Features: LONGER THAN COMPETITORS' TUBES