30x20 White Aluminum Modern Air Return Grille with Washable Filter (Duct Opening) RFG See the 4x10 Brown steel

See the 4x10 Brown steel floor register in the same 2-way design

If the opening is approximately 10" × 6"

Need a return air grille

Duct opening size: 12" × 8" (this is what you measure)

this 8x6 linear slot diffuser fits

30x20 White Aluminum Modern Air Return Grille with Washable Filter (Duct Opening) RFG See the 4x10 Brown steelFITS 30" x 20" DUCT OPENING CHECK BOTH DUCT & FACE SIZE BEFORE ORDERING: This return air grille is listed 30" x 20" by duct opening size the open hole in your wall or ceiling, not the face size. Check (1) duct opening: neck size is 29 3 4" x 19 3 4", slightly smaller than the opening for easy insertion. Make sure there is enough flat surface for a flush fit. Do not order by your old covers face size alone. See our sizing photo for all dimensions.