Ideal for oil spil containment or as a barrier against floating debris. Manufactured from heavy duty, oil resistant. PVC-coated nylon, the Flat OP-40 Booms have completely enclosed flotation elements of closed-cell foam. Steel weights at the bottom of the boom are sealed in and the whole exterior presents a sooth surface which is easy to clean the booms are fitted with eyelets at each end enabling multiple booms to be joined together to cover a greater area.