This International Standard specifies requirements, including dimensions, for agent-specific filling systems for agent-specific anaesthetic vaporizers. This International Standard does not specify construction materials. NOTE 1 For recommendations on materials, see Annex A. Because of the unique properties of desflurane, dimensions for this agent have not been specified in this International Standard. NOTE 2 Designs of connection systems, which only permit engagement of the agent-specific bottle adaptor to the bottle when the bottle collar is in place, are encouraged.