Custom Coaches made the body of this bus. It has 280 horsepower Scania engine. The buses were built in 2011 to 2012. The buses feature 8 wheelchair seats, a Hispacold air conditioning and a Mobitec flipdot display and THOREB controllers. However bus 2569 has an orange Hannover display board, fitted for a trial of LED displays.
In November 2017, new K310UB's were starting to get delivered. These buses are CB80 series 2's. Series 2 versions have a sleeker air conditioner and LED display.
The buses are numbered 2378, 2404-2420-2445, 2454-2492, 2522-2535, 2546-2569 and 2886. However, bus number 2527 has m/o 8542.They can be seen around the North Shore area and in the Inner West. They are at Willoughby, Randwick and Kingsgrove.
The buses are powered by diesel. The engine is Euro 5 compliant and the length is 12.5 metres. Maximum seating capacity is 47 and the maximum standing capacity is 22. The desto controller on this bus varies, though most have a Mobitec ICU402. Note that the desto can be changed by the THOREB in any bus.
CB 80's are seen only in the TfNSW livery with a light blue chevron at the front and a white chevron followed by another light blue chevron.