Corovent Low Profile 10mm Over Fascia Vent 1m Length - Box of 50 Description Discreet eaves ventilation which is highly effective despite being virtually invisible and is suitable for use on buildings with or without soffit overhangs and with corbelled eaves. Made from lightweight yet, very strong polypropylene, it features a 4mm grill stopping large insects or small rodents getting into the roof void. Features Unique low profile design is only 16mm high. Minimum disruption to eaves detail. 10mm continuous ventilation into the roof void. Matches FV10 in all other respects.