... tight conduit. 2.Galvanized steel core,PVC coated,interlock type. 3.Size from 1/4" to 4". 4.American standard. Liquid ... Flexible Steel Conduit:Description:1. Produced according to various national standard.2. Galvanized steel core,PVC jacketed,interlock type.3.Oil ... grey,other colors are available upon request.1,Product pictures: 2, Detail information: Cat No.SizeInside Diameter/mmOutside Diameter/mm ...