This 9" x 6" Hit and Miss air vent is ideal for single brick apertures (229 x 152mm), featuring an adjustable sliding grill to control airflow. Its versatile design helps manage stale air, dampness, and unwanted smells, making it perfect for both fresh air and warm air systems. Suitable for both interior and exterior applications, this vent ensures effective ventilation and easy installation (screws not included). Note: It is not suitable for gas appliance venting. This adjustable aluminium vent is ideal for providing air flow through a building, helping to reduce problems caused by stale air, dampness, smells and condensation. MAP HARDWARE GOLD COLOUR ANODISED ALUMINIUM ADJUSTABLE VENT (HIT AND MISS) FOR OPENINGS 9" X 6" 229MM X 152MM MEETS BUILDING REGULATIONS INCLUDES FITTING INSTRUCTIONS.