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2 Pack of Handua 18"W x 18"H [Duct Opening Size] Steel Return Air Filter Grille [Removable Door] for 1-inch Filters | Vent Cover Grill, White | Outer Size: 20 5/8"W X 20 5/8"H for 18x18 Duct Opening
HOW TO MEASURE - 2 Pack of 18x18 Steel Return Air Filter Grille for Wall Openings. Always measure the wall opening to determine which size you should order. Wall Opening Size = Listed Size. If the hole on the wall is 18"(W)x18"(H) please order 18"x18"...
£97.39 Delivery: £38.42