Razor barbed wire also concertina wire. Material: iron wire,stainless steel. wire and blade make up. BTO 28, 30, CBT60, 65. Razor barbed wire, also concertina wire, concertina razor barbed wire, razor blade wire etc.Barb ... type: BTO10, 12, 18, 22, 28, 30, CBT 60, 65 etc.Finish condition: spiral type ...