ZK rigid single socket elbows - They are available in three colour variants, white, grey and black on request. They are made of high quality, hard material with medium resistance to mechanical impact and compression. The ZK single rigid socket elbows offered by us do not spread the flame. They are distinguished by good chemical resistance - at room temperature they are resistant to alcohols, petrol, oils and acids, as well as to ageing and atmospheric factors or UV radiation.