... : St35, St37, St45, St52, E235, E3 DI DIN 2391 Seamless Precision Steel TubesDetailed product description: 1)Standard: DIN2391, EN10305-1, EN10305 ... . 5) All steel tube can test Ultrasonic flaw detector, Eddy current flaw detector, depend on customers requirement6) Usage: Cylinders of machinery ... and service systemConvenient location for transportFlexible payment DIN 2391 Seamless Precision Steel Tubes