New Pig skimmer sock. Tough, chemical-resistant polypropylene skin and filler absorb oils but repel water-based liquids. Ideal for skimming oil off acid or caustic baths or for use in other acidic environments. Meets NFPA 99 standards for static decay. Attached string allows socks to be tied down, tied together or dipped into tanks. It float at the surface for easy retrieval. Absorbs and retains oil-based liquids - including lubricants and fuels - without taking in a drop of water. Absorbs up to 1 gallon per sock. Absorbency: up to 10 gallon per box. Composition: skin - polypropylene and filler - polypropylene. Measures 3-inches external diameter by 48-inches length.