1. POWERFUL VACUUM GENERATORS Exceeds performance specifications of equal capacity vacuums Super quiet, only 77 dB(A) Protected by a rugged, chrome plated, one piece-steel dome cover 2. CUSTOM H.E.P.A. FILTER Meets military and UL specification 586 & 900 plus ANSI,AEC, OSHA, & EPA specifications Individually D.O.P. tested and certified for 99.97% efficiency against 0.3 micron size particles (per mil-std 282) 3. INTERMEDIATE FILTER Extends the life of the HEPA filter Two-ply, double seam construction Elastic top for proper fit around tank rim 4. DISPOSABLE FILTER BAG 2 Ply construction for initial filtration Self-adhesive seal patch to prevent material spillage (Backpack & 15Gal.only) 5. RECOVERY TANK Heavy gauge stainless steel/painted steel for long life and easy cleaning 6. DOWN LATCHES Sturdy 1 wide for secure locking 7. VACUUM HOSE & TANK CONNECTION Triple pin, all metal for positive lock & seal Crush-proof 1.5 hose with full 360