440mm x 120mm / 18" x 5'' Inch Two Sided White Door Air Vent Grille - Door Vent Register for Interior Door, Bathroom, Bedroom, Garage, Kitchen

Tamarack Technologies Perfect Balance 27 1/4 x 4 3/4 Inch In Door Return Air Pathway

White Bathroom Door Mini Circle Air Vent Grille 40mm / 1.57" Two Sided Round Ventilation Ducting Cover Furniture Soffit Grid T71

Door Air Vent Grille 460x135mm (18.1x5.3inch) Double Sided "BROWN" Ventilation Cover ABS Plastic

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HG POWER 6 Inch Round Air Vent ABS Louver White Grille Cover Adjustable Exhaust Vent Fit for Bathroom Office Kitchen Ventilation

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Door Air Vent Grille 460x135mm (18.1x5.3inch) Double Sided "OAK" Colour Ventilation Cover ABS Plastic