90 Day Filter 18" x 18" x 1"

This filter is 18x18x1 and measures 17.7x17.7x1. With a 600 performance rating and a MERV 8 rating this filter is up to 20 times more effective at capturing micro particles than ordinary fiberglass filters. It captures large airborne allergens like mold spores and large dust particles. This product is excellent for high-velocity equipment and lasts up to 3 months. No unnecessary antimicrobial chemicals added. Filtrete filtering material will not support the growth of bacteria mold mildew or fungi in normal use. This is a 1-PACK.