This is for a Brand New, Never Been Used Patternmaster choke tube. The model #5496. This is for Benelli Crio/Beretta Optima Plus. This model is the Anaconda, Short Range. Patternmaster Anaconda SHORT range (0.733”) has “Gas over Constriction Technology” within the patented “Coil Zone” made up of internal channels used to harness gas expelled from the ammunition. “Coil Zone” channels are spun in a negative twist to stabilize the wad for even, consistent patterns and keep the tube tight in the barrel. Anaconda SHORT range will throw an IMPROVED CYLINDER pattern with distances out to 40 yards. This tube is safe and effective with steel or other non-toxic shot as well as lead shot. Note: Testing done by Ballistics Performance has determined that ammunition with velocity of 1550fps and below will achieve the best results with Patternmaster Tubes. Patternmaster’s 12ga Benelli Crio/Beretta Optima Plus will interchange with Benelli Super Black Eagle II, M2, Ultra Light, and Current Benelli Production Sport II, Super Sport, Cordoba, and Montefeltro; Beretta A391 Extrema II, Vinci, and Super Vinci; and Tri Star 3 ½ (current production); just to name a few. For more information about your shotgun interchange please see the firearm owner’s manual or contact the firearm manufacturer. This is Sold As Is, NO Returns.