Carlson's Choke Tubes Benelli Nova & S-Nova Barrel 18 1/2 in. w/Adj Sights Cylinder Black. All barrels are constructed from certified ordinance grade 4140 steel with chrome lined bores. Vent rib models have a satin matte blue finish with red fluorescent front sight and brass center bead. All 18 1/2" barrels are non vent ribbed and have a ramped front sight with a matte finish. Each barrel comes with a Carlson choke tubemanufactured from 17-4 stainless steel except for the rifled choke tube models which are made from 304 high stress stainless steel installed. Enhance the versatility and performance of your shotgun with a Carlson's replacement shotgun barrel. Fits Benelli 12ga only. Specifications for Carlson's Choke Tubes Benelli Nova & S-Nova Barrel 18 1/2 in. w/Adj Sights Cylinder: Manufacturer: Carlson's Choke Tubes Color: Black Fabric/Material: Certified Ordinance Grade 4140 Steel Barrel Length: 18.5 in Gun Make: Benelli Gun Model: Benelli Nova Benelli SuperNova Choke Type: Cylinder Features of Carlson's Choke Tubes Benelli Nova & S-Nova Barrel 18 1/2 in. w/Adj Sights Cylinder: Benelli Nova & S-Nova Barrel 18 1/2" w/Adj Sights Cylinder Package Contents: Carlson's Choke Tubes Benelli Nova & S-Nova Barrel 18 1/2 in. w/Adj Sights Cylinder wrench What firearm models does the manufacturer say Carlson's Choke Tubes Benelli Nova & S-Nova Barrel 18 1/2 in. w/Adj Sights Cylinder is compatible with? The manufacturer says that Carlson's Choke Tubes Benelli Nova & S-Nova Barrel 18 1/2 in. w/Adj Sights Cylinder is compatible with Benelli SuperNova Benelli NovaCarlson's Choke Tubes 87018: Benelli Nova & S-Nova Barrel 18 1/2" w/Adj Sights Cylinder Black