Meltblown Universal Drum Top Pads have a 22" diameter to mount on 55-gallon drums, with 25 pads included per bale. MBT's drum toppers feature an FMF construction (a 3-ply composite of fine fiber, meltblown, and fine fiber polypropylenes), which lends this product a high degree of durability, reduced linting, and quick absorbtion. These gray-colored universal pads absorb most aggressive (acidic/caustic) and non-aggressive fluids (oil, water, glycols, etc.), and the tacky surface of the FMF composite allows this product to grip drum lids. These drum topper pads are designed for use as drip catchers, but they can also turn a drum lid into a table for greasy tools.