Factory Original Replacement Siemens Acuris Life, Artis, Cielo and Centra Earmold Tubes, available in ten (10) packs of earmold tubes. These come in a pack of 'ten(10)Right Earmold Tubes' sizes 1R through 6R. All tubes are numbered for their size next to the dome end. Two R (2R) is the standard size earmold tube. On the order form is a comments section. Please let us know any particulars as to size of tubes and domes when ordering.