20x30x5 (19.75x29.75x4.38) MERV 13 Aftermarket Honeywell Replacement Filter (2 Pack) Honeywell model FC40R air filter # FC40R1029. Replaces Expandapac filter # FC35A1068 that was used in model F35R1028. Aftermarket replacement filter. Nominal size 20 x 30 x 5. Actual size 19 3/4 x 29 3/4 x 4 3/8. This is an aftermarket filter.