YSI, Young Sung Ind. Co., Ltd. established in 1991 is a company specializing  in molding composite material. For your short note, our main items are as follows.  1. GRP Sectional Water Tank  2. Stainless Steel Sectional Water Tank 3. Filter Inside Water Tap (Shower Head Type for Kitchen) 4. Tap Attached Type Water Purifier 5. Under-Sink Type Water Purifier 6. Various kinds of ACF Filters  7. Other Water Treatment Systems (Domestic and Industrial