Beretta Choke Tube OptimaChoke HP Flush 28Ga Beretta Optima-Choke® HP Tubes Stand Up To The Heat Of Competition. Manufactured From High Strength Steel And Finished In a Nickel-Alloy Coating, These Chokes Guarantee Significant Corrosion Resistance And Have The Ability To Withstand The rigors Of Steel Shot. Optima-Choke® HP Tubes Are Fully Interchangeable On All Beretta Barrels That Are Threaded For Optima-Choke® HP Fits: Beretta A400 Xtreme, A400 Xplor, A400 Xcel, 690, 692, DT11, A300 Xtrema, SV10, A400 Action 28 Ga. Manufacturer: Beretta Manufacturer Number: C61899 Upc: 082442720869