Cold-rolled precision seamless steel tubes for automobile shock-absorbers

The tubes can be used for making hydraulic cylinders of automobile shock-absorbers.
The company can such tubes according to DIN2391 to meet users? requirements. The steel grade can be supplied as follows, 
The specification can be supplied is : OD.: 20~60mm WT.: 1~4mm
Note: 1. ID. tolerance +0.025mm/-0mm. 2.ID. roughness tolerance 0.8 um. 3. Straightness 0.5~1.0mm/m
  Origin
China
  Material
Carbon steel
  Packaging
Nude packing, bundled with steel strips.
  Minimum order
5Mt
  Supply ability
1000Mt/year