Now that is scary. I think I’d be on the phone to your suppliers and ask them for a way of sending that picture to them so they can see. I don’t think for one minute they wouldn’t replace them for you but will the next ones be the same. If nothing else I think it’s worth drawing their attention to it and maybe they’ll stop selling them. Are you supposed to paint them on fitting ?
Ozziedog,,,,,,,,, it seems the same with most rubberised components