An adjustable hit & miss grille plate for covering over and providing ventilation through a 9 x 3 opening. Hit & miss cover can be used to reduce or completely close off airflow. The vent is designed to fully cover over a single brick aperture. Disengage flyscreen from faceplate and screw over opening using four No. 8 gauge round head screws of appropriate length. Suitable for use in most domestic situations including larders, cupboards & wardrobes. To clean, wash faceplate in soapy water. This product is not suitable to ventilate gas appliances.