Concertina wire is a type of razor wire which is formed in large coil which can be expanded like a concertina.

In the past time, concertina wire is widely used in wars as barrier for protection and defencing. Later concertina razor wire can be found in agriculture, industry, road protection and other fields. Concertina razor wire materials have galvanized sheet, stainless steel sheet, low carbon sheet and hot dipped galvanized wire, stainless steel wire and others.

Concertina razor wire have flat concertina wire and concertina razor wire coils. The common concertina wire coil has the single concertina wire coils and double concertian razor wire coils. Double concertina wire using two pieces of stainless steel razor wire or zinc-coated razor wire are bound together by clips to make it stronger. It is used as security fencing and isolation for gardens, residences, military sites and other sites requiring high security.
 

Reference Number	Blade Style	Thickness	Wire Dia	Barb Length	Barb Width	Barb spacing
BTO-10		0.5±0.05	2.5±0.1	10±1	13±1	26±1
BTO-12		0.5±0.05	2.5±0.1	12±1	15±1	26±1
BTO-18		0.5±0.05	2.5±0.1	18±1	15±1	33±1
BTO-22		0.5±0.05	2.5±0.1	22±1	15±1	34±1
BTO-28		0.5±0.05	2.5	28	15	45±1
BTO-30		0.5±0.05	2.5	30	18	45±1
CBT-60		0.6±0.05	2.5±0.1	60±2	32±1	100±2
CBT-65		0.6±0.05	2.5±0.1	65±2	21±1	100±2

Barbed Tape Concertina (CBT);Barbed Tape Obstacle (BTO)
Standard materials are either galvanized or stainless steel.
Note: the length and the diameter of the coil can be designed according to the customers' need.