General description This product includes 12 reusable pollen filters designed specifically for CPAP machines. These filters are made from filter cotton and are essential for effective air filtration, ensuring clean air for users. Technical specifications Material: Filter cotton Size: 6.8 x 6.8 cm Color: Blue & White Package Contents 12 reusable filter cotton Other information Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product. The measurement allowed error is +/- 1-3 cm.