This is a chemical for etching titanium and niobium to improve anodizing results. Multi-etch will significantly improve the colors you can get in titanium - with multi-etch you can make titanium colors as bright as niobium. Multi-etch can also be used to undo anodizing.Sold in a 1 lb bag that will make 1 gallon of solution.We can only sell this to Canadians and we can only ship using Canada Post Expedited Post It can't ship using any airmail service - nor outside the country!! This is because of chemical shipping regulations. In the US you can buy from Multi-Etch. For more info on this chemical please refer to https://orders.multietch.com/ This product is not returnable.