Complex sentence: However, there is another scale that was introduced in 2007 that is also commercially available, called T Gauge, it is gauge track and is a scale of 1:450, basically half the size of Z scale.
Split into simpler sentences: However, there is another scale that was introduced in 2007 that is also commercially available. Called T Gauge, it is gauge track and is a scale of 1:450, basically half the size of Z scale.