This is a replacement disposable white filter to be used in Respironics REMstar Legacy (pre-2007) machines. This filter is NOT meant to be used with M-Series REMstar or System One REMstar machines.
Compatible machines include:
REMstar Lite CPAP
REMstar BiPAP AutoSV Advanced
REMstar BiPAP Auto with Bi-Flex
REMstar BiPAP ST Gray Model with Smart