SpillTech Oil-Only 8" x 18" Sock/Net Boom (By/Each). Remove oils without emptying your bilges and sumps, no matter how deep they are, with Oil-Only Booms. Strong mesh outer sleeve encases a poly sock skin filled with highly-sorbent poly blend. Booms won't shed or sink, even when saturated with oil. Poly blend filler is hydrophobic; repels water (and floats) while only absorbing oils and other hydrocarbons. Simply clip a rope or chain to the carabiner to raise and lower Boom into bilges and sumps, regardless of depth. Clip lets you fasten Boom to anchor ring inside bilge; shorter length is ideal for tight spaces. Sturdy hardware and design ensure long-lasting durability. Bright White Boom makes it easy to see when it's fully saturated; saves money by not throwing it away too soon.