Sadly I was looking for the wrong thing. I love the colour, no idea if there is an industrial reason but it matches the jar I am trying to seal, perfectly. I have a ceramic jar with a wooden lid which requires a seal to make them fit together usefully (lid wobbles around the space and isn't airtight now) I measured and this seal fits the groove in the lid to a tee (It is tricky getting purchase on it to ungroove it). Just isn't fat enough to then seal the jar. Not sure what will work but till I find something else I shall have a colour coordinated lid that still wobbles around.