When using urethane, epoxy, lacquer, and wet materials, the Viledon 300 Series is what your paint booth requires! The Viledon Fiberglass 20" x 25" Standard Paint Arrestors - 300-301 is composed of a thin glass fiber and a layer of spun glass fiber. Weighing in at 14 grams per square foot, these glass fiber filters prevent buildup on exhaust fans and ducts while overspray paint particles become trapped. Fiberglass 20" x 25" Standard Paint Arrestors - 300-301. Case includes 50 filters.FREUDENBERG NONWOVENS