21.25x21.25x1 (Actual Size) AccumulairA (R) Diamond 1-Inch Filter (APR 1950)
AccumulairA (R) Diamond MERV 13 More than 30 times more efficient than ordinary fiberglass filters Highest efficiency AccumulairA (R) filter on the market Meets criteria required for certification in the Leadership in Energy Environmental Design Lasts up to three months
21.25x21.25x1 (Actual Size) AccumulairA (R) Diamond 1-Inch Filter (APR 1950) Review
My 21.25x21.25x1 (Actual Size) AccumulairA (R) Diamond 1-Inch Filter (APR 1950) came in amazingly nice packaging, but this is last good thing about it. I am disappointed by , and I won't be buying anything from them.