... stents, oil drilling, engineering machinery, conveying the hydraulic system with certain pressure and temperature of the water, emulsion, glycol solution, ... Special request can add spirallayerand ext-ernal protective cover. High pressure spiral hose technical indicators sizexLayer NO.InsideDiametemmtolerancmmSteel layer diameterOutsidDiametmmtoleranmmPressureWorkingMPaProofpressureMPaMin.BendRadius ...