Bioammo Rex Steel 12 Gauge 2-3/4in #7 1oz Target Shotshells - 25 Rounds - Bioammo Rex Steel Range Sport Shotshells offer a fresh option to the hunting market; a 0% plastic, 100% biodegradable shot shell case and wad. These non-toxic, bio-compostable elements of the shot shell allow you the opportunity to aid in contributing to the future of a cleaner planet. Bioammo offers superior quality in their cartridge development along with maximum efficiency when it comes to speed and penetration. 0% plastic Steel shot 100% biodegradable case and wad construction Superior quality Maximum efficiency speed and penetration.