... .Various colors, sizes & custom order is OK 3.Factory offer, good price This steel packing strip ... σb ≥ 58-78Kg/mm2(580-780Mpa), elongation: 3% -5%.(2) Type II ordinary steel packing strip: ... σb ≥ 78-90Kg/mm2 (780-900Mpa), elongation: 3% -5%.(3) High quality steel packaging strip: high strength, good ... 1000Mpa), elongation: 5% -10%.Common specifications comparison table:BWG28 × 3/8", 1/2", 5/8"(0.36mm × ...