Designed for Class 1 (ISO 3), 99.9995% efficient at 0.12 microns. Stainless steel tank, 3 stage filtering, disposable paper bag, cloth filter bag with replacement indicator light, 65 dBA noise level, 4 gal dry only capacity, 99 CFM, 88" lift, Flashing in use light. USES TOOL KIT 17A.