code DK 021:2015 44110000-4 "Construction materials" (Rain trap, heavy, cast iron, round, main, D400, KDU 7MR; Reinforced concrete rings KS 10.6; Reinforced concrete rings KS 10.9; Reinforced concrete cover plates PP 10-2; Bottom plates PP 10-2 ... I will reinforced concrete; KO6 reinforced concrete support rings, corrugated polyethylene pipes for the construction of non-pressure sewer networks, diameter 300 mm SN8 or equivalent)