Beretta OptimaChoke 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). OptimaChoke HP tubes are fully interchangeable on all Beretta barrels threaded for OptimaChoke HP.