The HF series is now available with environmentally sealed three axis handles. These new options; 50, 51, 52, and 55 all provide an Ingress Protection Rating of IP67 and are sealed against dust and moisture. The 50 and 51 handles provide three axis of proportional control, with the latter also providing one momentary pushbutton switch function. The 52 and 55 handles provide two momentary pushbutton switch functions in addition to the three proportional axis.