... boom 1.can enhance the work range of the excavator. 2.Good welding procedure. 3.Security for operator Long ... reach boom,Our products can fit for all sorts of excavator.Such as Komatsu,Catpillar,Kobelco,Hitachi,etcWe promise that, ... and skilful welding workersThe follow parameter of our standard long excavator boom as your reference ModelSDB120SDB200SDB220SDB300SDB350SDB400SDB450Total length of boom(mm) ...