19" High x 25 1/8" Width x 4 1/2" Thickness CFM 2700  03-0040

18 1/8" High x 20 1/8" Width x 4 1/2" Thickness CFM 2700  03-0050

18 7/8" High x 21 1/4" Width x 4 1/2" Thickness CFM 2700 03-0070