HS Strut Undertaker Ported Extended Choke Tube: * Designed for lead- and copper-plated shot in a 12-gauge Beretta Optima, Extrema, AL 391, Benelli Vinci, SBE2 and M2 Super 90 * Blued finish * 3" long tube * Knurled end for easy hand installation * Fits all 2-3/4", 3" and 3-1/2" guns