18mm uPVC Magnum Duo Bullnose Fascia Cappit / Cover Board 5m x 200mm - White Dimensions Length: 5m. Width: 200mm. Thickness: 18mm. Leg: 38mm overall. Material: uPVC. Guarantee: 20 years. Description The plain fascia system is a clean, modern style which includes the 10mm thick fascia board and a full range of accessories to ensure a neat and professional installation. The plain fascia system comes in a wide range of solid colours, woodgrain finishes and fascia widths.