Replacement Exhalation Vent Diffuser designed for AirFit N30i and P30i pillows nasal cushion systems. This multi-hole vent filter delivers quiet, even exhaled air diffusion and is easy to install and replace. Product Specifications Product Name Replacement Exhalation Vent Diffuser for AirFit N30i & P30i Pillows Nasal Cushion Multi-Hole Vent Filter Compatible Devices ResMed AirFit N30i / P30i Product Type Exhalation Vent Diffuser Product Size Standard Size for N30i & P30i