KBV-1 - Cover Box into concrete, configuration KB, colour grey, package - 10/140 pcs - the cover can be attached to the formwork by nails, after setting the concrete mix the front breaking part of the cover ir removed and a mounting space is created, during additional stucco the cover ZV 68 can be used for covering, for adjusting the height during additional aplication of plaster adjustable frame NR 68/6 or NR 68/10 can be used