This is the 2nd retention cord I have purchased for my mother who is in her 100th year. It is ideal, because the cord is not too long to get in her way, & the clip is big & easy for the care home staff to attach to her clothing.
The model for my Phonak Nathos doesn't appear in your list of options so I had to guess. Wrongly as it happens because on your site there is no cross reference to type against a picture. This simple thing would have saved me wasting my money. My aids have a female socket into which screws the male thread on the hook but what arrived were hooks with a female socket for an aid which has a male thread. A picture by the reference number would sort it easily. There are more options to try but as it stands it's trial and error when the model isn't listed which is disappointing. Delivery, however was quick.