Troops would often enhance the strength of their defenses by stringing barbed wire. The 15mm kit includes Eighteen 2" x 8" sections of barbed wire. The 10/12mm kit includes sixteen 1 1/2" x 6" sections of barbed wire. The 20mm kit includes eighteen 2 1/2" x 10" sections of barbed wire. The 28mm kit includes eighteen 10" x 3" sections of barbed wire.