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6" X 4" Adjustable AIR Supply Diffuser - HVAC Vent Cover Sidewall or Ceiling - Grille Register - High Airflow - White [Outer Dimensions: 7.75"w X 5.75"h] : Amazon.co.uk: DIY & Tools
Hart & Cooley - Why are registers and diffusers so important? They direct airflow and can control the volume of air released, making them a vital part of every HVAC system. Visit
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