Hydraulic Cylinder Honed Tube/Honed Tube/Burnished Tube Grade: ST52,ST52.3,CK45,E355,16Mn,STKM13C,SAE1020 Hydraulic Cylinder Honed Tube/Honed Tube/Burnished Tube Grade: ST ... BK+S,high precision cold drawn,seamless honed,burnished High precision cold drawn tube(ready to honed tube) can also be supplied. ( ... (); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Hydraulic Cylinder Honed Tube