Vent Systems 4" Inch Circular Air Diffuser - Adjustable Black Plastic Cover with Flush-Fit Flange Durable Easy-to-Install HVAC Register for Ceiling, Wall, Supply and Exhaust Ventilation

FITS STANDARD 100 MM / 4” DUCTS – Designed for ceiling or wall installation in HVAC systems, this circular air vent ensures balanced airflow for both exhaust and intake ventilation setups. ADJUSTABLE AIRFLOW CONTROL – The rotating centre plate allows precise manual regulation of air output. Perfect for maintaining comfort and energy efficiency in any room. DURABLE PLASTIC CONSTRUCTION – Made from heavy-duty black plastic resistant to heat, moisture, and corrosion. Retains a smooth finish and modern look even in bathrooms or kitchens. EASY INSTALLATION – Pre-drilled flange design enables quick mounting to round ducts using screws. Simple align-and-secure setup with no professional tools required. (SCREWS NOT INCLUDED) VERSATILE USE – Ideal for ventilation in homes, offices, sheds, and workshops. Suitable for HVAC ducting, wall vents, soffits, and air circulation projects where clean design meets reliable performance.