Razor Barbed Tape Barbed Tape Concertina (BTC); Barbed Tape Obstacle (BTO) Standard materials are either galvanized or stainless steel. Standard packages products are shown in the tables above, special specifications available on request. Outside Dia. Cyclomatic No. Overlay lenght Shape Remarks 450mm 33 8M CBT-65 Single coil 500mm 41 10M CBT-65 Single coil 700mm 41 10M CBT-65 Single coil 960mm 53 13M CBT-65 Single coil 500mm 102 16M BTO-10.15.22 Cross type 600mm 86 14M BTO-10.15.22 Cross type 700mm 72 12M BTO-10.15.22 Cross type 800mm 64 10M BTO-10.15.22 Cross type 960mm 52 9M BTO-10.15.22 Cross type