Roof ventilation that keeping large insects out Pack of 5 quick and easy fitting round soffit vents for providing roof space ventilation at the eaves. Suitable for new builds and also retrofitting to existing unvented soffit boards. Made from durable polypropylene and compatible with soffit board of any thickness. These circular soffit vents provide required ventilation whilst avoiding excessive airflow resistance in the soffit and preventing ingress of large insects. This 9mm thick rigid board is hollow so lightweight and cost effective . Typically fitted to the underside of a soffit but this board is also used for internal cladding of walls ceilings and sheds . Features & Benefits Quick and easy fitting push fits into 70mm hole Can be retrofitted use in new and existing soffits Strong and lightweight made from durable polypropylene Flexible positioning use for specific airflow needs Complies with BS5250 4mm wide slots Did you know When fitted...