... 1,min OD around 150mm2,weight of single piece between 50kg and 5t3,height within 2000mmsteel bar forging1,dia above 90mm2,length within ... %.4,we were certificated to ISO9001:2000 and passed the authentication of "Classification Society".5,we usualy use material of steel type of 15#,20#,25#,30#.35 ...