It sounds like you're mentioning a specific cut of beef, the "Rangers Valley Frozen Beef Tenderloin Strap Off Wx Wagyu X 7+," weighing between 18 to 20 kilograms.
Rangers Valley is known for producing high-quality Wagyu beef, and the tenderloin is a particularly prized cut known for its tenderness and flavor.
If you're planning to cook it, you might want to consider methods like grilling, roasting, or pan-searing to bring out its rich flavor and tender texture.