1.concertina razor barbed wire 2.Zinc coating:200g/m2 3.Type:BTO-22,BTO- ... Concertina Razor Barbed wire1. Razor wire Materials: Galvanized steel wire or stainless steel , PVC coated iron wire in blue, green, yellow and other colors.2.Types:Single loop razor wire ... &cross type razor wire3. Covering area can be 7m,8m,10m,12m,15m ...