Water Chamber Lid for DreamStation 2 Series Heated Humidifier 1137934 short tube and swivel) is

short tube and swivel) is designed for use with the Wisp Nasal CPAP Masks

This replacement Foam Cushion & Silicone Seal Pack is designed for all Aclaim 2 (HC401) and FlexiFit 405 (HC405) Nasal CPAP and BiPAP Masks

They connect the nasal puff pillows assembly to standard CPAP tubing

There's no need to sacrifice comfort when you use a portable CPAP machine

This headgear is designed for use with all SleepWeaver Elan Soft Cloth CPAP/BiPAP Masks

Water Chamber Lid for DreamStation 2 Series Heated Humidifier 1137934 short tube and swivel) isThis dark gray Humidifier Water Chamber (Tank) Lid from Philips Respironics is designed exclusively for use with DreamStation 2 CPAP & BiPAP Machines. The lid should not need to be replaced unless your original lid has been damaged or lost.