rotary drilling hose, I.D. 51mm---152mm rotary drilling hose Made according to API Spec. ... 7K . ISO9001:2000 rotary drilling hose, I.D. 51mm---152mm rotary drilling hoseAPI 7KConstructionReinforcement: Two high strength steel ... -coking hose.Oilfield, construction, mining and high performanceindustrial equipment.Grade D rotary and vibrator hose is manufactured with the highest quality ...