Fab n Fix Nu Mail E Panel u PVC Letterbox to suit doors 20mm-40mm thick. Fully suited die cast zinc flap & UV-safe black ABS frame. Quality & durability you can see & feel. Anti-snap flap opens to 180? with fully sprung return. Easier to operate, no broken flaps, even with the Sunday papers. 10" wide aperture. Meets Royal Mail standards, will..