... : 1.5mm-50mm Standard:GB/T17396-1998 Material:27SiMn Application: Hydraulic support, hydraulic prop Packing: Caps on two ends, wrapped with strong ... , or according to customers requirementsHydraulic Steel TubeSeamless steel tube for hydraulic and pneumatic cylinder use Processing modeDiameterLengthLinearityPrecisionRoughness of inner holeCold rolling30 ...