Based on this product's specifications, here are some alternatives and similar models
Replacement baby mask for Beurer nebulizers IH18 IH21 IH26 IH58 IH60 – pediatric mask for inhalation therapy
Summary description:
Replacement baby mask compatible with Beurer nebulizer models IH18, IH21, IH26, IH58 and IH60. Designed for pediatric inhalation therapy, the mask provides a secure fit for infants and young children to deliver aerosol medication effectively. Intended as a spare or replacement accessory for home use with the specified Beurer nebulizers to aid respiratory treatment and ease administration.