... 2: ISO 9001 Certification 3: OEM Service 1) Product Material: aluminum alloy, zinc alloy. 2) Surface Treatment: chrome plating, sandblasting, painting ... coating, electrophoresis. 3) Lead Time: 8 ~ 12 days 4) Suitable for various industries: auto, machine, valve, pneumatic, etc. 5) Whole process ... parts of the world to contact us and seek cooperation for mutual benefits. aluminum wheel cylinder