British Standard Medical Gas Outlets are fixed to the gas source by safety nut prevents non-competent personnel to connect the outlet to the wrong gas source. The releasing rings are gas specific via color coding and different shape it absolutely impossible to mix them. Geometrical and dimensional connector keying according to gas used for using safety. Non-return valve for no interruption in gas supply. Plastic foolproofing design to prevent gas interchangeability during reassembly. Color coding for different gas source and only accepts British compatible adapters. It can be used on O2, Compressed Air, Vacuum and N2O. Features Complies with BS EN 737-1, BS 5682 and HTM 2022 standard regulations CE approved Comprises of rough-in and finishing assembly Accept, retain and release the probe by means of a Push-pull quick release mechanism designed for fast, positive, one-handed operation Enclosed in a white ABS decorative mounting box with metal printed fasica. Mounting box and the fascia shall have rounded corners to avoid the possibility of injury.