2 packages of Genuine Phonak Power Smokey Domes … Size = Small20 Total!2 Packets of 10 each Phonak small power domes =20 domes. Attaches to end of Phonak Micro tubesShould be used to replace discoloured or damaged domesSuggested replacement every 6 – 10 weeks, depending on use and maintenanceAlways ensure that a new dome is pushed firmly onto the tubing over all the ridges before inserting into the ear.