Non-metallic building materials, namely, glass block and glass panels for building purposes, drawn sheet glass for building purposes, glass wall coverings sold as a component of building partitions; window glass for building, namely, tempered and semi-tempered window glass and double-pane window glass, laminated window glass and double-pane window glass, annealed window glass and double-pane window glass, window glass and double-pane window glass for thermal insulation and enhanced thermal in...