R17 ISO 11237-1 R17 SAE J517 R17 Inner tube: Oil resistant synthetic rubber Reinforcement: One braid of high-tensile steel wire(sizes 1/4,3/8 and 1/2)and two braids of high-tensile steel wire(sizes 5/8,3/4 and 1) Cover: Environment resistant synthetic rubber Temperature Range: - 40 F to 212 F(- 40 C to 100 C) Application: High pressure hydraulic applications and to replace 100R1 where higher pressures and a more flexible hose is required.