Ultra Fine Filters # 1035442 for REMstar M-Series, System One Series, System One 60 Series and Sleep Easy by Legend Medical Devices</br>Number of filters - 2</br></br>Product Description</br></br>Ultra Fine Filters # 1035442 for REMstar M-Series, System One Series, System One 60 Series and Sleep Easy</br><br/>http://www.amazon.com/gp/product/B00SLWDZ1K