If you want to take the most professional archaeology photographs possible, you will require the Archaeology Grooved Photo Board. This set comes with everything you need - characters and numbers that easily slide onto the black rubberised black panel. One storage box included for your characters/numbers. The panel measures 350mm x 200mm and is made of washable rubberised grooveboard and anodised aluminium frame. WHITE characters (234) and numerals/symbols (264) (19mm). Like any specialist equipment - please take care of it, do not leave it soaking wet. Dry it out and clean it before storing.