The triple swivel ball connector by Hosmer usually contains a grommet, but over years or decades one of these may wear down.

Use rubbers, chewing gum or what?

Here is what I found out:

• Hosmer tags these “50448 Rubber Replacement Grommet C759”. You probably might have to go through your prosthetist to get them.

• I found to be able to easily use relatively cheap grommets by Brimal Components, product / item number “CB800”, description “cable grommet 3,2mm”. They also sell them via their eBay store.

I slide them over the cable from the tiny end, not over the ball end. When I find myself without replacement grommets, I usually can round up some plasticine or otherwise sticky mass that is easy to deform and that stays in place, to temporarily fix the ball connector in place.