Replacement Philips Respironics DreamStation Ultra-Fine Pollen Filters</br>Same as OEM# 1122518</br>This filter only fits the Philips Respironics DreamStation Series CPAP and BiPAP machines</br>2 1/4" x 1"</br>HCPCS A7038</br></br>Product Description</br></br>Replacement Philips Respironics DreamStation Ultra-Fine Pollen Filters. Same quality/lower cost replacement filters. This is only for Philips Respironics Dreamstation.</br><br/>http://www.amazon.com/gp/product/B01J921CS8