30" X 10" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES tool bag + Product Details Perfect Fit 4" Round Duct Pipe Product Details Size The SHEASC10W1-HP

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 28" or 28" x 6" duct opening (measured at the opening)

+ Product Details Size – Stick-on collar is 16" and it is compatible with duct 16"

+ Product Details Size – 30"w X 10"h is the size for the duct opening measurement only

Actual Filter Size – 35 3/4"w x 9 3/4" x 1"

this register is available in 2-way

30" X 10" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIR FLOW LINEAR BAR GRILLES tool bag + Product Details Perfect Fit 4" Round Duct Pipe Product Details Size The SHEASC10W1 HP + Product Details Perfect Fit & Easy Sizing Designed for a 6" x 28" or 28" x 6" duct opening (measured at the opening) + Product Details Size – Stick on collar is 16" and it is compatible with duct 16"