Briley 12 Gauge Extended Choke Tube Benelli Crio Plus Cylinder .000 in Black Oxide. 005 inches (.127mm) increments let you precisely match your load to the shooting conditions. Long tube extends beyond the length of the muzzle features highly polished interior for less pellet deformation; reduced fliers and tighter patterns. Knurled grasping band speeds installation and removal. Choke constrictions is marked on band so there is no need to remove choke to verify size. Helical rifled Diffusion spreader tubes provide a pattern that is more open than cylinder. Please note you can shoot steel through our 17-4 stainless steel chokes Cylinder through Improved Modified only. Specifications for Briley 12 Gauge Extended Choke Tube: Manufacturer: Briley Gauge: 12 Choke Tube System: Benelli Crio Plus Gun Make: Benelli Condition: New Features of Briley Benelli Crio Plus Extended Black Oxide Choke Tube: Helical Porting Long parallel section ideal for lead or steel Package Contents: Briley 12 Gauge Extended Choke Tube Briley BCPX2B12CY: 12 Gauge Extended Choke Tube Benelli Crio Plus Cylinder .000 in Black Oxide