This is a supporting edge for a 22x22x0.4cm glass pane, to be used on a Velleman K8200. It completely shields off the sharp edge of the glass. You need to print the normal part 3 times, and the part with the ribbon opening 1 time. It is held together by pushing nails ( 2mm thick, 3-4 cm long) into the mounting holes. You might need to use some rolled up teflon tape as packing material between the parts and the glass, but this is most likely not necessary.