Universal Plus products are chemically inert and green in color (the universal symbol for safety) to indicate that they're intended for use with hazardous materials. Surfactant-treated, brightly colored absorbent picks up a wide range of aggressive chemicals while remaining chemically inert. Medium weight of chemical absorbent pad - optimal for most general maintenance needs. Universal Plus lab absorbent pads products feature 3-ply construction increasing durability while reducing lint. Perforations provide cost control and reduce waste by allowing you to use only what you need.