1. These CPAP Filters are compatible with a specific portable CPAP machine, making them ideal for travel. 2. The filters ensure that the air you inhale through your CPAP devices remains clean and healthy, allowing you to achieve optimal results from your therapy. 3. For best results, it is advised to replace the CPAP filter at least every 2 weeks. Name: CPAP Filter Type: Ventilator filter cotton Work Mode: CPAP Model Number: KXAM Item Type: Sleep & Snoring Category: air mini cpap accessories Colour: white Material: cotton Size: approximately 3 x 3cm Package Contents: 20 x disposable filter pads Only the above package content; other products are not included. Note: Lighting and different displays may cause the color of the item in the picture to vary slightly from the actual product. The allowed measurement error is +/- 1-3cm.