CHANGBAO 301是一种以聚乙烯为材质的半硬质热收缩套管。具有优良的绝缘、耐摩擦、耐溶剂、耐酸碱以及耐油等特性。广泛应用于电子、汽车、航天领域，如汽车油管、冰箱冷凝管等。

CHANGBAO 301 tubing is made from polyethylene which has brilliant resistant to common fluids, solvents, acids, alkalis and oils and excellent insulation. It may be used in field of electronics, mobiles and aerospace etc, such as automobile oil pipes, refrigerator cooling pipe etc.