Plywood screw on volume.
Our volumes are made from 18mm plywood and have a textured coating on them.
This volume has 3 T nut placements on it. One on each side. It can be drilled to add more
the length of the the triangle is 90cm long, it sticks out of the wall by 15cm
its great to run up, or lay back from. You can add to it with screw ons so you can pinch your way up it.