Federal Premium Ultra Steel 12 Gauge 3-1/2in #2 and #4 1-1/2oz Waterfowl Shotshells - 25 Rounds - Stretch the range of steel. Federal Premium Ultra Steel blends the rear-opening FLITECONTROL FLEX wad with a payload of our best zinc-plated steel, producing extremely tight patterns and extending effective range. Rear-opening FLITECONTROL FLEX wad Premium zinc-plated steel Extremely tight patterns Reliable primer and clean-burning propellant Double-stack load features two sizes of shot: smaller pellets that create full patterns and larger ones that deliver better lethality at a distance