... BTO10,12,18,BTO22, 28,30.CBT60 65 concertina razor barbed wire /Blade wire : 1. Material: 1)Hot dip galvanized plate + hot ... . 2. Production method:1) straight line type2) concertina type 3. Razor Specification: Outside of diameter : 450mm ,500mm,600mm, 700mm, 800mm,960mm ...