17
Insulation articles and materials; vapour and moisture barrier articles and materials; thermal insulation articles and materials; acoustic insulation articles and materials; composite materials comprising plastics material and metal, the plastics material predominating
19
Building and construction materials, non-metallic or predominantly non-metallic; composite materials comprising plastics material and metal, the plastics material predominating; signs and information and advertising displays, being non-metallic or predominately made of non-metallic materials; building materials (non-metallic or predominantly non-metallic) for making signs and information and advertising displays (included in this class)
20
Nameplates, not of metal; number plates, not of metal; placards of wood or plastics; signboards of wood or plastics