A 15-foot air coil set in red and blue, used as the combined service and emergency air brake lines connecting a tractor to a trailer. This version comes with a 40-inch lead on one end and a 12-inch lead on the other, giving extra reach on the tractor side while keeping the trailer-side connection compact. The two-color coding (red for emergency, blue for service) follows standard air brake line conventions for Class 8 trucks and trailers.
