Beretta Optima-Choke HP tubes stand up to the heat of competition. Manufactured from high strength steel and finished in a nickel-alloy coating and a colored aluminum band, these chokes guarantee significant corrosion resistance and have the ability to withstand the rigors of steel shot (No steel shot tighter than MOD). Optima-Choke HP tubes are fully interchangeable on all Beretta barrels threaded for Optima-Choke HP. Only use Optima HP choke tubes in these Optima HP shotguns: SV10 Perennia, SV10 Prevail, A400 Xplor, A400 Xcel 692, DT-11 and UGB25 Sporting.