Construction: Tube:Oil resistant synthetic rubber. Reinforcement:Four tensile steel wire spiral layers. (DN10/12/16/19/25) Six tensile steel wire spiral layers. (DN32/38/51) Cover:Black, abrasion and weather resistant synthetic rubber. Temperature range: -40° C to +121° C Application: Heavy duty impulsive high pressure hydraulic applications like excavators, dosers, dumpers, cranes, compactors, rock breakers and hydraulic drill rigs and other construction equipments. Suitable for petroleum based hydraulic fluids, synthetic esters, biodegradable hydraulic fluids, water-glycol based fluids and air.