Dear Sir Madam, Material:Iron reatment:Galvanized,PVC Coated Type:Barbed r Type:Double Razor and Single Razor application:prison keywords:razor barbed type:manufacturer certificate:iso9001-2000 weaving way:Reverse twist, normal twist ,2.5mm etc barbed length:15mm-30mm Barbed distance:75mm~150mm barbed ity and good price