备注: Description : Honed seamless tubes for pneumatic & hydraulic cylinders. Specification : 1. Internal diameter accuracy: H7-H8 2. Internal roughness: Ra 0.2μm ~ Ra 0.8m 3. Standard length: 3M- 6M 4. Special length: 10M 5. Internal diameter: 18Ø ~ 400Ø 6. Material: JIS STKM 13C or mechanical construction use carbon steel pipes (Other specifications can be made customer request based on)