19 Non-metal swimming pools and structural and replacement parts and accessories therefor, namely, non-metal steps, ladders, non-metal coping for use in non-metal swimming pools; fiberglass swimming pools and structural and replacement parts and accessories therefor, namely, non-metal steps, ladders, non-metal coping for use in non-metal swimming pools; swimming pools, sold as a unit in kit form, comprised primarily of non-metal swimming pools and their component parts; non-metallic building materials used in construction of swimming pools, namely, slabs of manufactured concrete and aggregate materials composed of marble and cement for swimming pool finishes; non-metallic artificial rocks for creating landscape and waterscape settings and landscaping products in this class, namely, geotextiles in the nature of fabric and sheeting for landscaping; non-metallic paving stones and concrete products for swimming pools, namely, pavers, concrete blocks, concrete walls, and concrete panels