Fits Skeet 20 Gauge shotguns; Stainless steel with black oxide finish; Laser etched gold accent band; Minimum gap geometry plus high-resolution "RMS" finish reduce plastic buildup in bore; Invector-Plus long taper choke tube technology; Flat choke tube wrench not compatible with Midas Grade Extended Choke Tubes; Extends beyond the barrel for easy removal and installation; 17-4 stainless steel; 25% - 55% Choke pattern percentage; Weight: 4.8 oz