Pit Posse 11003S 4' S Track Anchor Aluminum Tie Down Track Rail Enclosed Cargo Trailer Van Truck - Silver This S Track is SILVER in color. Made of aircraft quality aluminum, this sturdy and attractive track offers versatility and durability. Predrilled mounting holes 4 inches centered. Fittings are spring loaded and snap securely into place, yet can be moved to different positions quickly. Can be mounted to floors or walls. Vertical lift capacity of 4000 pounds with single stud fittings.