Apex Ammunition Waterfowl TSS/S3 Steel Blend 12 Gauge 1 5/16 oz 3in 4/7.5 Shot Shotgun Ammo 25 Rounds. The ''duplex'' also known as a blend includes 1/4oz of the TSS to maximize pattern density and help virtually eliminate cripples. When you look back on those hunts you'll know that little extra made all the difference. Specifications for Apex Ammunition Waterfowl TSS/S3 Steel Blend 12 Gauge 1 5/16 oz 3'' 4/7.5 Shot Shotgun Ammunition: Manufacturer: Apex Ammunition Gauge: 12 Number of Rounds: 25 Shot Size: 4 7.5 Shell Length: 3 in Muzzle Velocity: 1450 ft/s Application: Hunting Waterfowl Included Accessories: None Shotgun Shot Weight: 1 5/16 oz Shot Material: Steel Primer Style: Centerfire Cartridge Case Material: Plastic Lead Free: Yes Package Contents: Apex Ammunition Waterfowl TSS/S3 Steel Blend 12 Gauge 1 5/16 oz 3'' 4/7.5 Shot Shotgun Ammunition What is Apex Ammunition Waterfowl TSS/S3 Steel Blend 12 Gauge 1 5/16 oz 3'' 4/7.5 Shot Shotgun Ammunition good for? The manufacturer suggests that it is good for waterfowl hunting.Apex Ammunition WS3-475: Waterfowl TSS/S3 Steel Blend 12 Gauge 1 5/16 oz 3in 4/7.5 Shot Shotgun Ammo 25 Rounds