Hevi-shot hevi-bismuth waterfowl shells utilize bismuth, which is 22% denser than steel, to deliver more downrange lethality.And, its safe for older fixed choke and fine classic doubles shotguns.Shot Material: BismuthGauge: 12 GaugeLength: 3"Ounces: 1 3/8 ozShot Size: 1Muzzle Velocity: 1450 fpsRounds Per Box: 25Boxes Per Case: 10Application: WaterfowlHazair: YesAmmunition cannot be shipped to a P.O. Box, please use a physical address during checkout. For restricted state buyers (CT, IL, MA and NJ), please email a copy of your state's credentials, and a photo ID along your order number to ffl@firearmsdepot.com&nbsin 5 business days to avoid cancellation and refunding your order. For California and New York buyers, please have your dealer email us a copy of their FFL or Ammo Vendor License along with your order number to ffl@firearmsdepot.com within 5 business days to avoid cancellation and refunding your order. Your order will not ship without us receiving this information. Thank you for your cooperation