Kald Int'l Industry Limited is one of the leading China bs4568 gi conduit class 4 manufacturers and suppliers,Website:http://www.kaldint.net, and also a professional company and factory, welcome to buy low price and high-quality bs4568 gi conduit class 4 and wholesale our good products.Product: BS4568 GI Conduit,Class 4Description:* Hot Dip Galvanized Steel Conduits complying to BS 4568 Part 1 :1993.* Hot dip galvanized (Heavy Protection), both inside and outside.* Both ends threaded with one coupler and protected with plastic cap at the other end.* Standard Length is 3.75 meters (10pcs / bundle).SizeDimensionO.D.*wall thickness*length16mm16mm*1.6mm*3.75m20mm20mm*1.6mm*3.75m25mm25mm*1.6mm*3.75m32mm32mm*1.6mm*3.75m40mm40mm*1.8mm*3.75m50mm50mm*1.8mm*3.75m