The Welseal letterplate from Yale is a good quality letterbox with a coloured aluminium flap and an ABS surround in white or black with internal draft seal and external weather seal. There are two variants; 20/40 suits panels, whilst 40/40 suits doors between 40 - 80mm thick.
Endurance tested to 20,000 cycles and corrosion tested to 96 hours(NSST).
