Description:White Gaps Gas Apparatus Protectors - Small, 50/Box. Non-woven white polyester shields. Pre-formed, reduce cross-contamination by shielding reusable nasal hoods from direct facial contact and filtering respiration. Protects hoses from respiratory contaminants and hoods from nasal secretions, skin oils, make-up, and other discoloring agents. Adds a more sanitary feeling to the delivery of nitrous oxide and oxygen. Can be used with any nitrous oxide hood.