GM 80 vacuum 01790150 - Vacuum with ULPA Filter - Lab/Cleanroom Vacuums, Nilfisk-Advance America - Each" Model GM 80 vacuums are ideal for laboratory and cleanroom maintenance Portable units feature four stage graduated filtration system that includes a high filtration 8. 5L (2. 25gal.) disposable bag, a main filter that retains 99. 8% of particles down to 3m, a microfilter that retains 99. 5% of particles down to 2m, and a HEPA or ULPA exhaust filter. The HEPA filtered version retains 99. 97% of all particles down to 0. 3m in size. The ULPA filtered