Parts list: № Number Qty Name Options 1 BA26506 1 Marker (16" Notched Disks, Depth Gauging Bands and Tube Extensions) Next page: ST323066 Marker Arm and Mounting Parts, 11 Row 15 in. Spacing ST323072 Notched Disk and Marker Arm Extension ST323069 Folding Marker Arm, 13 Row, 15 Row 18, 19 and 20 Spacing ST323071 MARKER DISK AND EXTENSION TUBE ST323070 Folding Marker Arm, 12 Row 22 Spacing ST323068 Folding Marker Pivot, 12 Row 22 in. Spacing, 13 and 15 Row 18 to 20 in. Spacing