... diameter) are:10*20mm, high pressure pipe10*17mm, ,16*24mm, low pressure pipe Test ItemTest ConditionStandard SpecTest ResultsI.D.9.8 ... "Precision, Efficiency and Harmony".Technology and Service SupportEquipment & Test FacilitiesAll facilities are impoted from Japan, US, UK, etc ... Golden Dargon,Lonking,Shanghai Shenlong,Zhongda Group,ect high pressure and low working noise and rubber power steering ...