Specifications include, but are not limited to: Air Filter, 24" x 24" x 2", MX40, Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 20" x 20" x 2", MX40-203, Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 20" x 25" x 1", MX40-104, Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 16" x 25" x 2", MX40-202, Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 16" x 20" x 2", MX40-201 Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 20" x 24" x 2", MX40-203, Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 20" x 20" x 1", MX40-203, Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 10" x 60" x 1", MX40, Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 20" x 25" x 2", MX40-204, Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 10" x 36 1/2" x 1", MX40, Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 16" x 20" x 1", MX40-101 SP, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 13-1/2" x 77-1/2" x 1", MX40 Spec, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 18" x 24" x 2", MX40, Spec Double, Pleated, 30% Efficiency, 11 pleats/foot; Air Filter, 12" x 24" x 2", MX40-210, Pleated, 30% Efficiency, 11 pleats/foot;