Dear Mr Perry,Thank you for your email. Please note the reply below on the material:oil tube: SUS316L or HDG(hot dip galvanized) KEL: Oil tube in HDG materialcooler fin: HDG or Aluminum KEL: Cooler fin in HDG materialcooling fanguard: SUS304 KEL: To be confirmed with factory, as their offer stated composite material cooling fan blade: Aluminum alloy or stainless stealKEL: Fan blade in aluminum materialOnce I have confirmed with factory on the fan guard material, I will proceed to submit the budgetary offer for this inquiry. Best regards,