Meltblown Oil-Only Boom Pillows measure 18"-long with an 8" diameter, with 10 boom pillows included per bale. MBT's oil-only booms pillows are oil-absorbent and water-repellent, designed to skim oil off of water in a sump or bilge pump. An O-ring is included on one end of the boom to anchor the pillow, and these white-colored booms absorb an average of 28 gallons per bale. These absorbent booms are maufactured using the highest quality materials, allowing each boom to be strong enough to withstand the elements, and the combination of each unit's components, including a sock and net covering, produces the finest boom in the industry.