Trays are made from 6mm thick black fabricated polypropylene. Each tray has a "push fit" stand pipe overflow which is removable. This fitting has a 1½ " threaded socket in the underside, so pipe work can be fitted. Tray depth is 5" for marginals and 10" to 15" for lilies. The "two tier" table has a lower front tray for two rows of lilies and a higher, shallow rear tray for marginals.The table frames are made from 30mm box section steel with a paint finish.The legs have adjustable height feet so the tables can be levelled.