USDA Prime grade whole beef tri tip, sold by the pound as a full case. The tri tip is a flavorful triangular cut from the bottom sirloin, typically weighing 2-3 pounds per roast with minimal waste fat or gristle. Each roast serves 4-6 people. As a Prime grade cut, this tri tip features exceptional marbling for superior tenderness and rich beefy flavor, making it ideal for grilling, smoking, or sous vide cooking. Costco blade tenderizes their tri tips to enhance tenderness. For food safety with blade-tenderized meat, cook to an internal temperature of 145°F followed by a three-minute rest, or use low-temperature cooking methods held for extended periods. Best results come from slicing against the grain after cooking.