Fits Swift™ LT, Swift™ LT for Her, Mirage Swift™ II, Swift™ FX, and Swift™ FX for Her The ResMed Distal Pressure Port Attachment is an optional accessory for the ResMed Mirage Swift nasal CPAP mask. The distal pressure port can fit onto the Mirage Swift short tube assembly to create a vent for excess air far away from the mask. One end of the part is made to fit onto the Mirage Swift short tube assembly and the other end is made to be compatible with all CPAP tubing