1. Commodity: Hard chrome plated concrete delivery cylinder

2. Size range: ID of 150mm-280mm

3. Steel grade: CK45,SAE 1045,ST52，E355,E410,E470

4. Manufacture method: cold drawn, hot rolled+deep hole bored

5. Delivery condition: Stress relieved, Quenched+Tempered

6. Thickness of hard chrome plating: 0.2mm min on both sizes. 

7. Hardness of chromed layer: HV800 min

8. Machining,Threading, Turning as per drawing. 

9. External painting: as per request

10. Packing: Plywood boxes.