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China Factory Stock a Type DN20-DN300 K Upc ASTM Heavy Light Stainless Steel Ss Hubless No Hub Coupling, Find Details and Price about Hubless Coupling No Hub Coupling from China Factory Stock a Type DN20-DN300 K Upc ASTM Heavy Light Stainless Steel Ss Hubless No Hub Coupling - Qingdao L&C Import and Export Co., Ltd.