Model:CR4-231
            X4-70003
            X5-71277-901
            R4-116
Material:ZG30Mn2 or the otehers
Diamter(Inch):51
                          36
                          65.5
                          45
Weight(Kg):    1100
                          539
                          2870
                          940
we can do customized design and manufacturing according to customers' requirements.