HEPA Filter Element - direct replacement on most Alto/Wap vacuums. Meets OSHA, EPA RRP and DOD standards, retaining 99.7% of all particles down to 0.3 microns. Required by contractors to meet the new EPA lead RRP rules. Measures approx 7 1/4" wide by 5 1/2" and fits the following..........

• WAP Aero 440/640/840/840A (5 & 7 gallon)
• Alto Aero 21/26/31 models (Basic and INOX)
• ST10 and ST20 (dome)
• ST35/ST35E
• WAP Turbo 10 gallon (766, AS/PE, RDF & RDFD)
• WAP Turbo 15 gallon (786 & 786 RDF)
• SQ550 (14 gallon)
• Attix 8 (Basic, AS/E and Hepa models)
• Attix 12 (Basic, RDF and Hepa models) (not for XC models)
• Attix 30 (Basic, AS/E and Hepa models)(not for XC models)
• Attix 50 (Basic, AS/E and Hepa models)(not for XC models)
• Attix 19 (Basic, RDFL and Hepa models)(not for XC models)
• Stihl SE-100

Note - most older SQ (non-HEPA models) came standard with a shorter element and taller filter holder. Customers with these vacuums will need to purchase a HEPA Filter Kit.