R15 ISO 3862-1 R15 SAE 100 R15 EN 856 R15 Tube : Oil resistant sythetic rubber Reinforcement : Four altemating layers of spiral high-tensile steel wire (sizes 12,5/8,314 and 1") and Six altemating layers of spiral high tensile steel wire (sizes 11/4,1 1/2"and 2"). Cover : Environment resistant synthetic rubber Temperature Range : -40 F to 250 F (-40 C to 121 C) Application : Design specifically to handle severe high pressure applications where pressure or constant hydrostatic loads are present