TLR75004
This is a 30ml tube of 100,000CS silicone differential oil from Team Losi Racing.
This oil is used in the differential of 1/8th scale off road buggies, truggies (and some 1/10th vehicles).
The higher the CS number of the oil, the thicker the oil is. The thicker the oil, the less your differential will "diff out" in the corners, where the two tires will turn at different speeds.
Changing the oil in your differentials is one of the most important tuning options for off-road buggies.