Black Plastic Soffit Vents Pack of 50 Plastic push in soffit vents for roof and eave ventilation. Diameter hole needed: 70mm. Meets building regulations. Made in durable polypropylene. Rigid quality vents not to be confused with the cheaper thinner vents. UV Resistant material to stop sunlight fade. Insect Grill- No Unwanted Guests. Provides a free airflow of 1600mm² per unit. Other colours available in our shop. Use For roof eaves ventilation - soffit application For remedial work on existing roofs On roofs where ventilation equivalent to a continuous 10mm opening is required On roofs where the eaves incorporate a soffit board Features & benefits Efficient, unobtrusive and easy to fit Can be fitted to existing soffit boards in situ 4mm wide holes comply with BS 5250 : 2002 Durable and totally resistant to decay UV stabilised and colourfast Quality Satisfies all NHBC Standards 2008 Edition Manufactured to BS EN ISO 9001 : 2008 Complies with all relevant Building Regulations Meets all relevant British Standards Material & colour choice Manufactured by injection moulding in polypropylene Available in white, black or brown Provides a free airflow of 1600mm² per unit and Can be spaced at 160mm centres to achieve ventilation equivalent to a continuous 10mm opening