
Measure the maximum depth of the Louvers.
Max 1" depth for standard covers. Measure in multiple locations around the rim.

Remember to measure in multiple locations! Measure from straight edge to highest point on the outmost diameter sealing surface.

Measure Outmost Diameter Sealing Surface of your 6" Ceiling Diffuser. Measure straight across. If between 7 1/8" and 7 3/4" our standard option should fit!

Straight Across the highest rim of outer diameter. If between 7 1/8" and 7 3/4" our standard options should fit! The standard options in stock should fit most common 6" Duct Vent Diffusers.
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