Since 1985, Duck Shin Fitting Co.,LTD. has established and been developed. As a leading manufacturer and exporter of Wrought Copper Fittings for all kinds of H.V.A.C. systems in Korean nationwide. We are under licensed Korean Standard (K.S) and with it conformed to U.S. ANSI B 16.22, also producing to ISO 2016(BS EN 1254-1) of Metric sizes. And we are mostly welcome to the customer requirement relating to items of unspecified on our catalogue. We are looking forward to the pressure of serving you. Very truly yours, Byung Yoon, Lee Representative director Duck Shin Fitting Co.,Ltd.