... ). Item no.: 53-1, 53-2,53-3,53-4, 53-5 available5). MOQ: 500pcs2. Details about the Porcelain Insulators Spool 53 ... Porcelain Insulators 53-1, 53-2,53-3,53-4, 53-5 Cat.NO.Fig.Main Dimension(mm)TransverseStrengthNPower frequency voltage(KV ... ). Certificates: ANSI, XIHARI, IEC, SA, AS;4). Anuual amount: More than $ 2.5 million US dollars.5). A wide range of low and ...