6" X 12" FLOOR REGISTER WITH LOUVERED DESIGN - FIXED BLADES RETURN SUPPLY AIR GRILL - WITH DAMPER & LEVER - BLACK 8" Diameter + Product Details Perfect Fit Suitable for all AC 8in diameter 12125SDCLNGBX

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 6" or 6" x 8" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 28" OR 28" x 26" duct opening (measured at the opening)

+ Product Details Outer dimensions: – fits a duct opening

Design – Removable frame for easy filter change & cleaning - uses a 1" thick filter

6" X 12" FLOOR REGISTER WITH LOUVERED DESIGN FIXED BLADES RETURN SUPPLY AIR GRILL WITH DAMPER & LEVER BLACK 8" Diameter + Product Details Perfect Fit Suitable for all AC 8in diameter 12125SDCLNGBX + Product Details Perfect Fit & Easy Sizing Designed for a 8" x 6" or 6" x 8" duct opening (measured at the opening) + Product Details Perfect Fit & Easy Sizing Designed for a 26" x 28" OR 28" x 26" duct opening (measured at the opening)