Aluminum weatherproof louvres are a functional and stylish method of venting via an external wall. The louvres protect from weather and the 2mm aluminum mesh keeps pests out and provides a BAL-40 bushfire rating. Rivets in the neck adapter may be removed for use in general wall ventilation. - Cut-out size of 320 x 320mm (face size 375 x 375mm)The cylindrical neck allows for attaching ducting - Ideal for venting fans or range hoods of 250mm ducting - More durable than plastic alternatives - Can be used in a variety of types of walls including brick and weatherboard - Box total depth is 180mm with a 70mm neck and 105mm box depth with a face protruding 5mm.