The inner tube of hydraulic hoses need to be put for at least 8 hours before braiding steel wire. Why is it need to wait before continuing production ? 1)After hydraulic hose inner tube was extruded from the machine, it is 110 C degree, and then the inner tube go through cooling water tank, and then rolled . 2)At this moment , even if the temperature is coming down, but inside rubber , it needs more time to recover. 3)Before braiding the hydraulic hose inner tube will be frozen at 30-35 C degree below zero. So only after the rubber recovery, it can be frozen and braided better. 4)There are many differences during produciton of hydraulic hose from difference China factories. We only make high quality hydraulic hoses, and we control more strictly then others, which assure high and consecutive quality inside hydraulic hose, which the customers can not see when receiving shippment . 5) What's more quality control and quality tracing back on hydraulic hose, rubber hose, you can send inquiry to us or call me.