Executive Standard: GB/T 10544-2013、ISO 3862:2009 SAE J517 100R13 (19.25 is 4 layers wire spirals,32.38.51 is 6 layers wire spirals) Tube: Oil resistant synthetic rubber Reinforcement:4 or 6 layers spirals of high tensile steel wire Cover: Black corrugate, oil,weather and abrasion resistant synthetic rubber Temperature Range: -40℃ ~+121℃(-40 ℉ ~+250 ℉) Application: Transmit petroleum base hydraulic fluids or water base hydraulic fluids