OMRON C28P Mouthpiece Set – Mouthpiece for Advanced Valve Technology Only suitable for the OMRON C28P inhalation device. Suitable for adults and children. Mouthpiece sets should be replaced at least every 12 months. This is the only way to ensure effective and hygienic inhalation therapy in the long term. Please refer to the detailed shelf-life information in the user manual for your device. OMRON Inhalation Therapy – Trust in Expertise Absolute expert in the field of inhalation: world's No. 1* Reliable quality for over 40 years All OMRON inhalation devices are fully reimbursable with no additional payment.** Official member of the sponsoring association of the German Respiratory League e. V. 1 year warranty *IHS Technology Report Nebulizers World 2014" Nebulizer set 1 year **Excluding co-payment