Replacement speaker for many Oticon RITE hearing instruments. Not suitable for Dual or Delta. Please check the end of your current receiver to check the size (from 0 to 5) and select from the drop-down box. Please be sure that you need a medium speaker (yellow M printed on it, and not a standard speaker (green S printed or no marking at all on older speakers). Please ensure you select the correct item as these cannot be returned for hygiene reasons.