A unique container, found while studying the Trailblazers equipment warehouses in the lab under the Radar, nicknamed Sheaf by stalkers. As the most experienced stalkers say, during the arrival of Knyazevs group in the Zone, Scientific Research Institute 7 produced only a few containers from the KZS and Canister series. It seems Sheaf is the result of the Trailblazers groups efforts, likely drawing certain knowledge from the lab where the group settled.