Wire mesh bench: galvanized steel wire welded. the standard hole size is 1.18"*5.12", 2"*2" etc. tailor-made wire mesh hole size and steel wire gauge is available.
Expanded metal bench: more heavy load. holes and mesh gauge is optional too.
Ebb & Flow bench: suitable for pot and tray growing. water supply and drainage may go through one end quick valve, also may separate supply and drainage pipe. this system easily to recylce water.