Brown Mini Castellated Roof Tile Vent Fits Marley, Redland, Forticrete & Sandtoft Brown roof tile ventilator. In-line and discreet low profile design. For roof ventilation, extractor fans and soil pipe termination. Can be used with concrete and traditional clay tiles. Fully independently wind tunnel tested. Round 100mm (4 Inch) outlet connection for mechanical extraction. Opening can be attached to a soil stack or extractor fan with a 100mm - 120mm PVC hose. These vents are not a product of Marley but are designed to fit Marley products. Any use of brand names is to aid the search for Marley compatible tile vents.Tile Vent For use with: Marley Ludlow Plus Redland 49 Sandtoft Standard attern Forticrete V2Tile Specification: Width: 195mm ( 230mm Including under lap section ) Height: 390mm. Vent tile performance: Free airflow 5,000mm² Complies fully with relevant Building Regulations and British standards. Manufactured with UV stable materials to reduce colour fade. Other colours available in our shop.