12x15x1 (11.5 x 14.5) 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
12x15x1 (11.5 x 14.5) AccumulairA (R) Diamond 1-Inch Filter (APR 1950) Review
The shipping was done quick , the books look like on the image , pretty good quality, I wouldn't mind buying from the same manufacturer again.