32"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 33.25"W x 5.25"H] 16in diameter Motor Shaft is made of 4" Round Duct Pipe Product Details Size The SHEASC10W1-HP

Motor Shaft is made of High Quality Flame Retardant Metal that does not corrode

actual front end outer dimensions are 11" Width X 11" Height

actual front end outer dimensions are approximately 28 5/8" width X 34 5/8" height

+ Product Details Size - 18"w X 24"h is the size for the duct opening measurement only

+ Product Description The Baseboard Return Air Grille is a high-quality HVAC vent duct cover designed to fit flush with baseboard work

32"W X 4"H [Duct Opening] Linear Aluminum Clip On Bar Return Air Grille [Outer Dimensions: 33.25"W x 5.25"H] 16in diameter Motor Shaft is made of 4" Round Duct Pipe Product Details Size The SHEASC10W1 HP Motor Shaft is made of High Quality Flame Retardant Metal that does not corrode actual front end outer dimensions are 11" Width X 11" Height