Technical specifications:
The roller blocks are available in 2 models WRB 3-24, range 3 - 24" WRB 24-56, range  25 - 56" Undercarriage as an option  The stands are equiped with 2 rolls The rolls can be turned 90 degr in the frame work. Thanks this system the stands can be used for rolling or turning the pipe. Download here the documentation.