These quality filters are compatible with several Emerson, Electro-Air, White Rodgers & Comfort Plus filters.
Approximately 20-3/4" x 20-5/8" x 5"
Emerson, Electro-Air, White Rodgers: ACM1600, ACB1600, FR1600, 0121-018200, 825-0586, FR1600-101, ACM1600-101, FR1600-100
Other Manufacturer Part Numbers: DPFI20X21X5, DPFI20X21X5M11, DPFI20X21X5M13, DPFI20X21X5OB, ACM13WR.20215.2, ACM8WR.20215.2