... spiralCover: featuring oil-resistant, Low temperature, weather proof and anti-ageingCoupling type:LP and TBG of API Spec 5B,Flange or clip specified ... hose. We are the main supplier for CNPC, SINOPEC and CNOOC, and the products have been expored to Europe, North America, ... Middle East and Southeast Asia and so on.The LONGKAI(LK) rotary drilling hose is ...