These indoor/outdoor panels are manufactured from weatherproofed 18mm thick Finnish birch ply coated with a UV resistant polypropylene laminate (WBP exterior bonded to EN314-2/Class 3), which can be used with dry wipe markers to mark out routes. The distance between the two panels can be varied depending on the height of the users. Installation can be onto any solid wall. Each pair of panels is supplied with 40 pre-fitted holds, and 2 additional loose holds. The fittings supplied are for installation in brick or breeze block. The top panel measures 2400mm x 600mm (8’ x 2’) and the bottom panel is 2400mm x 400mm (8’ x 1’4”).