Teach you how to identify the quality of the hose
1, the amount of wall thickness: to see whether the provisions of the wall thickness, here also note that some of the pipe is empty, both ends of the wall to meet the requirements, but the middle wall thickness is thin, did not meet the requirements, cost. 2, the amount of length: to see whether the required length, and some manufacturers by shortening the length to reduce the price. In acco.........