1) there are two kinds for your choice: air supply grille, air return grille.2) dimension:200X150mm; 250X150mm; 200X200mm; 300X300mm.3) you can also change other wood species to make the air vents as above style, such as oak, mahogany, birch, maple...
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floor register, floor vent, drop in vent, baseboard register...
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