It is modular system. Begin with basic set (check photos) which is suitable for paints, glues, surfacers, varnishes and decal agents. Then you can purchase additional parts which are suitable for example for paints only etc. Of course it is possible to attach these parts together with basic set. On top is a bar for injections (for paints I am currently using). It is possible to attach this whole thing on the wall.
Plywood 6mm and 3mm. Don't worry HGW Paint Rack is solid enough.
HGW produce light and dark. Surface of light one isn't varnished so you can impregnate the rack according to your preferences.
cca 34cm height, 24 cm width, 25 cm depth (base).