HONGWU-20+ years experience in nanoparticles production & delivery. 200nm Cu price, Colloidal Gold , Antimony Tin Oxide Powder , 20nm Palladium Nanoparticles ,200nm Silver Nanoparticles . We offer products and service for researchers, distributors and end users at home and abroad. If any need welcome to inquiry! The product will supply to all over the world, such as Europe, America, Australia,Pakistan, Hungary,Cyprus, France.If you're planning to order small sample or larger quantities for your industrial or academic needs, please note that customization of parameters are also available, such as size, functionalities, SSA, packages,etc. Contact us get more info.