Rheem and Ruud MAGNET Replacement Filter for RXGF-E21AM10 MERV 11 (2) each. Size 21x28x4 1/2 Actual Size 20 3/4x27 1/2x 4 3/8. NEW MERV 11. This Filter is made by Magnet by FiltersUSA. (SBRXGFE21MQP)(50001-102-0106)(FR20.7527.755TOP) 2 EachMagnet by FiltersUSA