These tubes are made of polyurethane (PU) so that the tubes flexibility is not influenced by temperature and with long life expectancy. The Tubes are smooth and easy to pass. The nose end with rounded edges reduce risk of tissue damage. The opposite end formed and ridged for secure and easy connection to both Stomach Pump, Funnel and Activated Charcoal bottle. Easy to clean and can withstand all normal disinfectants. Non-traumatic side holes (2)