1. When you need a larger scope of work you can choose

extension arm + extraction arm (DEA or DPA). 

1) Extension arm can rotate horizontally 180 degrees. 

2) Length of extension arm:1.5m, 2.5m, 3.5m and 4.5m. 

3) Extension arm can be used with 2m-4m extraction arm (DEA or DPA). 

4) More product specifications may be customized.