Sigma is a subsidiary of a public listed company in Hong Kong. We are a direct and professional indium product manufacturer with 9 years research and marketing experiences. We offer various indium products to our customers such as Indium Ingot (99.993%, 99.995%,99.999%),ITOtarget, ITO powder(making to ITO target and ITO sol), In(OH)3 powder and In2O3 powder. Our customers are from Japan, Korea, China, Taiwan, Hong Kong, and Switzerland etc. We have a track record of reliability and we provide exceptional customer care services.