18"x18" Stamped Face Steel Filter Return Grille Vent Cover White Poweder Coating with Frame Outside Dimension 20.6"x20.6"The Listed size 18"x18" is for inside duct opening measurement, overall outside dimension is 20. 6"x20. 6" Stamped Face Steel Construction with 1 2" fin spacing for high air flow Screws are included for easy installation White Powder coating with matte finish Individually packed with cardboard box for ultra protection Size Selection Guide Measure the size of the air duct opening(the size of the hole ). Select the listed size that match the duct

actual overall outside dimension is 18

Universal 90 degree elbow connector fits all washing machines

Sidewall/Ceiling Register Measurement

White Powder coating with matte finish

The Listed size 24"x14" is for inside duct opening measurement

namely ASME A112

15" long heavy duty steel construction with matte black powder coating finish

This yellow epoxy-coated gas connector with fittings is designed for maximum safety

Individually shrink wrapped with cardboard pad in the back for extra protection

If your duct opening size is 8” x 8”

especially aliphatic and aromatic hydrocarbons

If your duct opening size is 8''X 8''