Powerful vacuum generators exceeds performance specifications of equal capacity vacuums. Super quiet, only 77 db. protected by a rugged, chrome plated, one piece-steel dome cover. Custom H.E.P.A. Filter meets military and ul specification 586 and 900 plus ansi, aec, osha, and epa specifications. Individually D.O.P. tested and certified for 99.97% efficiency against 0.3 micron size particles. Intermediate filter extends the life of the HEPA filter, two-ply double seam construction, elastic top for proper fit around tank rim. Disposable filter bag 2 ply construction for initial filtration, self-adhesive seal patch to prevent material spillage. Recovery tank heavy gauge stainless steel/painted steel for long life and easy cleaning. Vacuum hose and tank connection triple pin, all metal for positive lock & seal. Crush-proof 1.5” Hose with full 360° swivel.