The rack is made from pure stainless steel, even nuts & bolts are also made from stainless steel. The sturdy built quality and steel makes this rack long lasting. Apart from built quality, stainless steel provide great hygiene, now you don't need to worry for Termite , fungus, rusting, etc. The welding of all parts are done on specialized machines and it prevents any welded part to get stains due to water contact.