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The LEGO TECHNIC Excavator is loaded with realistic details and working functions, including mechanical actuators that raise and lower the articulated arm, an extending and contracting bucket scoop, 360-degree rotating cab section, and rolling caterpillar tracks! Download building instructions to rebuild into a Tracked Dumper! Turn the gear to raise and lower the boom, then flip the switch to move the bucket scoop! Rotating cab turns in all directions! Features turning caterpillar treads! Excavator measures 7'½" (19cm) long and 12" (30cm) high! Add motorized power with 8293 Power Functions Motor Set!