48"W X 6"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 49.25"W x 7.25"H] 14in diameter With a temperature range of 18" Round Duct Pipe Fixed 45 horizontal blades LO1810

With a temperature range of -4°F to 230°F

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 18" or 18" x 8" duct opening (measured at the opening)

ensuring they don't overlap

actual front end outer dimensions are approximately 38 5/8" width X 22 5/8" height -

+ Product Description Introducing our 4" x 14" or 14" x 4" Floor Grille - a reliable and durable air grill designed for exceptional performance and built to last

48"W X 6"H [Duct Opening] Linear Aluminum Clip On Bar Return Air Grille [Outer Dimensions: 49.25"W x 7.25"H] 14in diameter With a temperature range of 18" Round Duct Pipe Fixed 45 horizontal blades LO1810 With a temperature range of 4°F to 230°F + Product Details Perfect Fit & Easy Sizing Designed for a 8" x 18" or 18" x 8" duct opening (measured at the opening)