[ Non-metallic building materials, namely, non-metallic reinforcements for concrete, namely, plates, glass and plastic fibers, rods and bars; ] drainage channels of concrete; drainage channels consisting of non-metal fibre-reinforced concrete, non-metal fibre-reinforced casting materials and of other non-metallic building materials; non-metallic building materials, namely, drain connections for gutter systems and rainspouts [ ; non-metallic rigid pipes for building, namely, for use with gutte...