Row Markers Flat Fold and Bi-Fold Row Markers Electric over hydraulic operation Hydraulic block and switch box included Electric over hydraulic control and harness. Complete with adjustable Marker Gauge wheel and notched marker disc. Marker gauge wheels Flat fold row makers Flat fold row markers on 30' stacker Flat fold Marker Flat fold Marker Flat fold Marker Bi-fold marker on 30' toolbar. Bi-fold marker Bi-fold row marker