Second stage HEPA 500 pre-filter. Captures finer particles to help extend the life of the HEPA filter. Synthetic fiber filter media rated at 30% efficiency. Sturdy frame won't “blow out” under heavy use.
- Synthetic fiber filter media rated at 30% efficiency
- Low pressure drop and superior efficiency
- High dust-holding capacity
- Extends life of HEPA filter element
- Sturdy cardboard frame