A 20-foot single air brake coil with a red jacket, used as the emergency air line connecting a tractor to a trailer. This version features a 40-inch lead on one end and a shorter standard lead (typically 12") on the other, giving extra reach on the tractor side while keeping the trailer-side connection compact. It follows standard color coding (red for emergency air) for Class 8 truck and trailer air brake systems, with the longer 20-foot coil length suited to larger wheelbase configurations or extended trailer setups.
