20x25x4 Extended Surface Air FilterMERV 14, 90-95%, Koch 110-500-404 (2 pcs) voomi_id_13323 and valve covers

and valve covers

Modulating Function Technology for precise adjustments

providing an effective replacement

This vent pipe is designed for durability and safety in venting applications

20x25x4 Extended Surface Air FilterMERV 14, 90-95%, Koch 110-500-404 (2 pcs) voomi_id_13323 and valve coversCompact size, high efficiency extended surface filter. High efficiency microfiberglass filter media. Precision crafted corrugated aluminum separators. Compact design. Durable aluminized frame. Rigid, extended surface panel filters designed to provide high efficiency filtration in a compact, space saving 2 or 4 deep frame. They are constructed with a micro fiberglass air filter media that is engineered specifically for high efficiency applications. The