SoClean 2 Cartridge Filter Kit (Includes Check Valve Free) Package:16 Filters This is the Flip-Top Lid

This is the Flip-Top Lid (Cover) with Seal that closes and covers the removable humidifier chamber used on all H4i Humidifiers as well as HumidAir 3i Heated Humidifiers

ResMed's fourth generation Mirage Quattro provides superior seal and personalized comfort in a streamlined design that looks sleek and feels ultra light on the face

from Philips Respironics

These cushions are designed for use with all Quattro FX and Quattro FX For Her CPAP/BiLevel Masks and come in three sizes -- Small

A smaller style full face mask

SoClean 2 Cartridge Filter Kit (Includes Check Valve Free) Package:16 Filters This is the Flip-Top LidThis OEM SoClean 2 Cartridge Filter Kit includes one replacement filter for the SoClean 2 CPAP Sanitizer. For best performance SoClean 2 filters should be replaced on average every 6 months. This cartridge is compatible with both the SoClean 2 and the SoClean 2 Go. A check valve is included free as well!