The diameter of the metal tube is 25mm, and the thickness is 1.2mm;      
18mm or 15mm exterior hardwood ply top;      
6 coats clear polyurethane varnish: 4 on top 2 on bottom;      
Tops are edged with vinyl T-molding;      
Commercial grade powder coating on legs as your requirement.      
Two extra-wide wood runners on underside for stacking & protection.