Standard galvanised DURASTEEL® has a grade of Z275. Increased galvanised DURASTEEL® (Z450) may be available and can be manufactured as a special item, however only at 2.5m x.1.2m sheet size and a minimum order quantity of 4,000 sheets. 

There is also an increased cost to manufacture, and the minimum order quantity and price would be quoted relative to each enquiry. This would be advised upon by a DURASTEEL® Licensed Installer.