Product Description

This is the replacement Medium size gel cushion and SST flap for use with ComfortGel Nasal CPAP Masks. There are four sizes available For the cushion: petite?? small?? medium?? large. PLEASE NOTE: this cushion and flap are Medium size?? but it fits the small and medium frame?? so you may see S/M on the product.

http://www.amazon.com/gp/product/B009UKW9NM