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. 2 Panels. 20 X 22 Panels. Mfg #HD510954|3-Ply|less than lt/20% Efficiency|0.32 W.g. Initial Resistance|High Velocity 375 Fpm