Filtrete high performance filters are effective at attracting and capturing 97% of large airborne allergens like pollen, mold spores, and dust mite debris. Captures microscopic allergens like dust, smoke and smog particles. Electrostatically charged filters. Includes a filter change reminder sticker. Lasts up to 12 months. Purple label. Type: Pleated Electrostatic Material: Synthetic Size: 16 In. x 25 In. x 4 In. (Slim Fit) Actual Size: 15.44 In. x 24.44 In. x 3.69 In. Rating: 1550 MPR Life of Product: 12 mo