6780R Pro-Built Center Differential Watercolor this digital tool measures your

this digital tool measures your rocket’s altitude with precision and displays the results on a bright 4-digit LCD screen

As you traverse various landscapes

4V 2S 360mAh Li-ion battery pack provides extended run-time

Includes 4 wooden vehicles: three train cars and a park ranger vehicle

Precision manufactured for a safe and secure mounting position in all conditions

6780R Pro-Built Center Differential Watercolor this digital tool measures yourThe Pro Built center differential absorbs driveline shocks to improve durability and distributes power to all four wheels for mind bending acceleration. A 50 tooth, 32 pitch steel spur gear provides maximum durability. The sealed differential comes completely assembled and ready to install with 20m silicone oil to help prevent unloading and ballooning of the front tires. (Center differential requires 32 pitch pinion gear)