Spring Hydraulic Hose 1,ISO9001 2,with spring protect 3,competitive price 4,petroleum base hydraulic fluids Spring Hydraulic HoseDIN EN 857 1SCTube:oil resistant synthetic rubber.Reinforcement:one high tensile steel wire braid.Cover:Black, abrasion and weather resistant synthetic rubber. MSHA approved. the spring is added on the outside to make the hose has much better performance on abrasion ...