High efficiency, disposable filter bags. Converts any Shop-Vac wet/dry vac into a drywall vacuum. 2-ply construction offers 95% filtration efficiency at .1 micron. Inner liner improves filtration, durability, and capacity of filter bag. For dry pickup only. Collects very fine particles and dust such as drywall, plaster, and fireplace soot and allows for convenient removal from tank. For standard, QSP, ultra plus, and ultra-pro wet/dry vacs. 2 filters per pack.