Air Conditioning Pipe Fitting System Royals (Qingdao) Technology Co., Ltd. Base Info Model NO.：STMaterial：CopperConnection：MaleSurface Treatment：Plated CopperTransport Package：WoodenOrigin：Qingdao Description Pre：American Standard Welding Stud Aws D1.1 Next：International Standard ISO13918 for Shear Studs
