6" X 20" Or 20" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 21.75] Width_22in + Product Details Size –

+ Product Details Size – 20" x 30" or 30" x 20" is the size for the duct opening measurement only

Design – Circular return valves - designed to be used in low and medium pressure ventilation air conditioning systems

+ Product Details Size & Compatibilty - The 14" to 12" round metal pipe reducer & increaser 30 gauge is compatible with duct 14" to 12"

+ Product Details Size - 6"w X 4"h is the size for the duct opening measurement only

+ Product Description Protect your thermostat with the durable and tamper-proof Beige Metal Thermostat Guard

6" X 20" Or 20" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 21.75] Width_22in + Product Details Size –+ Product Details Size 6"w X 20"h or 20" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" width X 21. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation. Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully