1、 Check whether the surface is smooth and even, whether there are blisters, bulges, sponges, trachomas, etc;
2、 Bend by hand to see if there are cracks;
3、 Check whether the reinforcing layer of steel Shu wire is arranged regularly;
4、 Check whether the cross section, inner hole and steel wire layer are round and straight, and whether the thickness of inner and outer glue layers is uniform;
5、 Cut the inner glue and outer glue with nail or knife to see if they are firm;
6、 Is it pungent to smell internal and external glue with nose

Hose features
1. Flexibility between pitches.
2. It has good flexibility, no obstruction and stiffness.
3. Light weight, good caliber consistency.
4. Flexibility, repeated bending and good flexibility.
5. Good corrosion resistance and high temperature resistance.
6. Anti rat bite, good wear resistance, prevent the internal wire from being worn.
7. It has good bending resistance, tensile property and lateral pressure resistance.
8. Soft and smooth, easy to thread, install and position.