FEIN Turbo II X-AC HEPA Filter Wet/Dry Dust Extractor, 9.3-Gallon with Auto-Clean Filter and Accessory Kit - Shop PMC - Known as The Festool Superstore
Amazon.com - Fette Filter - Filter Set Compatible with Bissell PowerForce & Helix Turbo Inner and Outer, Compare to Part # 203-7913. (Pack of 2) -
turbo® II Precleaner – Westate Diesel Systems Australia
AGP Turbo 4" Shorty Air Filter RU-2510 - AGP Turbo