Winchester's Triple Seven primer is a clean burning primer that reduces fouling ring buildup, allowing muzzleloader shooters easy second shot loadings. It has a unique look with a black cap to distinguish it from other 209 primers. It is clam packaged 100 per package with clearly marked graphics to separate them from other primers. Specifications and Features: Type: Primers Caliber: .50 Finish: Stainless Color: Silver Size: 209 Model: 209 Triple Seven Quantity: 100 Per Box