Parts list: № Number Qty Name Options 1 BN909563 1 Sensor Kit INCLUDES BN202520 AND BN202539 2 BN202520 1 Sensor Kit 3 BN202539 1 Sensor Next page: ST531549 BOOM AUTO LEVEL ST531548 Valve Assembly And Hoses ST531550 BOOMTRAC HARNESS ST531547 AUTO LEVEL CENTERFRAME BRACKETS ST740896 Automatic Boom Leveling, 3 Sensors, BoomTrac™ Pro System, Attachment ST739483 Attachment, BoomTrac Pro™ Boom Levelling System ST531546 BOOMTRAC JUMPER HARNESS