GrowRACK Extension-Set 40 offers a six add-on construction poles to extend the height of the standard growRACK construction. Extension-Set will fit with all GrowRACK 25 models. Poles will give extra 11 cm extension. It will create more space under the grow-table for Technics like Water-cooler growCOOL nutrient edc. It is made of light-weight square-profile (25 x 25 mm, wall 1,5 mm) corrosion-free aluminium poles.