DOS10 is an over fascia ventilation strip. It is designed with a radiused leading edge to protect the felt and has an integral large insect and vermin inhibitor. The strips lock together and provide 10,000mm2 per metre of continuous ventilation. Features & Benefits Suitable for refurbishment projects and new builds Can be used with both slates and tiles For use with roof pitches between 15 - 70 degrees Product Specification Material: Polypropylene Colour: Black Weight: 0.15kg Height: 28mm Depth: 35mm Length: 500mm