These are collapsible sled racks for storing or maneuvering straight lengths of hose or pipe up to 20ft long. They offer better space utilization in yards or job sites, and convenient handling or identification of lengths. Removable posts allow sleds to be collapsed when not in use. Loaded sleds with contents should only be stacked during static, balanced storage on level, stable surfaces - consult a structural engineer for limitations. Stacking 'loaded' sleds on transport trucks or flat decks for travelling on roads is not recommended due to structural integrity and dynamic limitations. Use safety precautions - transport, handle, & use sleds at own risk. SLED-1000 are 18ft long x 3.5ft deep x 4ft high, maximum static storage loading 3300 lbs (1500 kg). They are made of powder coated steel and have support holders to lift with a forklift.