220-800-051 Size: 25" x 20" Features: -Fiberglass air filter.-Used in all types of HVAC systems to protect the coils from dirt.-Material: Strong, chipboard frame bonded to AAF manufactured premium grade fiberglass media.-Use as pre-filters to extend the life of higher efficiency filters.-Also used as pre-filters to extend the life of higher efficiency filters. Construction: -Disposable panel filters are engineered for sturdy, economical performance and ease of use.