... Material: Porcelain4). Item no.: 53-1, 53-2,53-3,53-4, 53-5 available5). MOQ: 500pcs2. Details about ... the Porcelain Insulators Spool 53-3 3. Design Drawing Spool Porcelain Insulators 53-1, 53-2 ... 1). Professional manufacturer;2). Investment to 5 factories;3). ANSI, XIHARI, IEC, SA, AS;4). Anuual amount: More than $ 2 ... .en.alibaba.com Haina (Fuzhou) Import & Export Co., Ltd