Gauge One models are built to a scale of 10mm/foot, or approx 1:30 scale. This is a great scale for live steam locomotives, or electric and internal combustion models. This scale is often used in the great outdoors, however, indoor scenic layouts are not unknown. These joiners are also used for SL-600 Sm32 Track.
PECO Gauge 1 and Sm32 Code 200 Setrack and Streamline track systems