10/20pcs CPAP Cotton Filters Ultra-fine PM2.5 Dust Filters Disposable Universal Replacement Filters
Features:Ultra-fine PM2.5 dust filters,filter fine dust particles.It is recommended to replace 1pcs within three month.Specifications:Material: CottonSize: 5.3 X 3.5 cm/2.09 X 1.38inchApplication: Professional for ResMed CPAP S9/S10Notes:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 1-3cm measuring deviation due to manual measurement.Included:size 1:10 X Filter Cottonsize 2:20 X Filter Cotton