High Quality Material: These filters are made of ultra-fine spun fiber cotton which can effectively filter fine particles, dust, and pollen. BPA-free, safe and reliable. Thickened Design: While other filters are approximately 1mm thick, these filters are about 3mm thick, helping to capture fine particles, bacteria, viruses, and other airborne contaminants, enhancing the respirator's filtration performance. Better Compatibility: Each filter measures 1.26 x 1.18 inches. The size is designed to fit AirMini machines securely, minimizing gaps and improving filtration efficiency. Improved Air Freshness: Each filter helps block fine and larger particulate matter, resulting in cleaner and fresher air output from the ventilator, supporting better air quality and patient well-being, and contributing to improved sleep quality. Extend Machine Life: By capturing dust and impurities, these filters help prevent contaminants from entering the ventilator, reducing internal wear, lowering maintenance and cleaning frequency, and extending the lifespan of the device. Color: White Material: Cotton cloth Package Contents: 50 x Disposable filter pads Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.