 Non-fiber design makes it durable and easy for maintenance. Insertion Tube Working Channel Working Length Water/Air Nozzle High Definition View Angle  EC-250H with its special water/air nozzle and big working channel, ideal for small animal gastroscopy. Multi-function Buttons ①Zoom ②Capture/Record ③Freeze Water/Air Nozzle With extended 1.5 meters working length and big working channel, EC-250H is ideal for equine applications, including upper and lower airway endos