Concertina Barbed Tape (CBT);Barbed Tape Obstacle (BTO) Material for Razor Barbed Wire Fencing: Galvanized blade, stainless steel blade. Features: Co***ct and rational structure, high safety factor, for the protection of prison and key project . Technical Note: Razor barbed wire fencing can be made according to the actual dimension of customer; the special specification is manufactured according to the drawing