10x Silicone Mask Insert, Inner Mask Support Frame for Bracket, Bracket Insert Frame for Mask, Anti Fog Guard Bracket.
I don't know what these are called so I looked online for the description so forgive me!
They're similar to this https://www.amazon.co.uk/Silicone-Insert-Support-Bracket-Freedom/dp/B08VRF5RP5
I have a pack of 10 to offer.
Collect from Stopsley Village near Shell.
Please say WHAT TIME you can collect in your response so that we don't need to to/fro messages.