Make sure you order the right product , of which I didn’t ! The parts in question DoNot fit ,are not for my hearing aids.
You win some you lose , I take responsibility for ordering the wrong part, I Don’t think there returnable because I opened then
These are Oticon domes and work as expected. Delivery was quicker than promised. While $1.00+ appears to be a competitive price, it's a lot to pay for a little piece of plastic that ENT audiologists give away.