mastergrowsupply.com is an authorized reseller for every product that is available on our website. All products we sell are brand new and come with manufacturer's warranties when available. The manufacturers have guaranteed us and our customers protection from defective products as part of our dealer agreement. Our restocking fee's are individualized based on the manufacturers requirements. If you have a warranty inquiry on any item purchased from mastergrowsupply.com, we can assist in getting you more information as well as reaching the manufacturer directly.