The star team evo cartridges are manufactured with our own proprietary selection of components and exacting quality controls, making this top-level competition sports shooting cartridge the pinnacle of our research and development efforts.Gauge: 12 GaugeLength: 2.75"Ounces: 1 ozShot Size: 8Rounds Per Box: 25Boxes Per Case: 10Hazair: YesAmmunition cannot be shipped to a P.O. Box, please use a physical address during checkout. For restricted state buyers (CT, IL, NJ), please email a copy of your state's credentials, and a photo ID along your order number to [email protected] within 5 business days to avoid cancellation and refunding your order. For California, Massachusetts 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 [email protected] 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