Fisher & Paykel Bias Flow Diffuser

These are replacement Bias Flow Diffuser filters for the Fisher & Paykel Flexifit 405 CPAP mask and the Fisher & Paykel Oracle Oral CPAP mask. They come in packages of 10 filters. These filters replace the current air diffuser for the popular Fisher & Paykel CPAP masks and they fit right into the elbow of the Flexifit 405 and Oracle 452.