Fisher & Paykel 431

Having only been on this therapy for two months I seem to be able to adapt fairly easy no trouble to speak of Insurancae paid 100% of my sleep study auto tritation and no problems getting the equipment that I wanted. I am using a F&P 431 mask. and I get a small and a medium silicon mask with the large that I use Wonder if any one out there in hose land would be willing to trade a new large for either a medium or small unused. the bag has been opened.
Orcia