BestAir XPANDA 16 in. W X 28 in. H X 4 in. D 13 MERV Pleated Air Filter, B & K, Mfr#: AXP-413-13R-2$58.79+
Flanders 87357.011620 19.9 x 15.9 in. Natural Standard Pleated Air Filter - 3 Pack; Pack Of 4, Aaf Flanders, Mfr#: 166209$110.99+
Standard Capacity Air Filter, 20W x 20H x 2D, Pleated, MERV 8, Global Industrial, Mfr#: B2308758$7.29+