Plain Tile Vent - Terracotta & Adaptor. Fitted whilst laying the roof (can be retro fitted as well). Can be used in conjunction with Adaptor ULTI3PTVA and Flexi-Pipe ULTI3FP if connection required. Available in up to four colours, with a 10,000 mm2 airflow and can be laid down to 35˚ roof pitch.
eBay