Link Panel Air Filter. 3-Ply. less than lt/20% Efficiency. 0.32 W.g. Initial Resistance. High Velocity 375 Fpm. Pink/White Media. Maximum Temperature 120 Degrees Fahrenheit. 7 Panels. 25 X 22 Panels. Mfg #HD511093|3-Ply|less than lt/20% Efficiency|0.32 W.g. Initial Resistance|High Velocity 375 Fpm