Features: and high quality The inline filter is suitable for CPAP machines. It is used in combination with the machine's built-in inlet filter to provide clean air. The outer diameter of the male connector end: 25mm. The inner diameter of the female connector end: 22mm. Suitable for 22mm tubing. Installation and replacement are quick and easy. The filter is connected between the air inlet or outlet of the machine and the CPAP hose. Best results: Helps maintain clean air intake for CPAP devices to support effective therapy. Set of 6 filters. Latex-free. Each filter is individually sterilized and sealed. Package Includes: 6x Inline CPAP Filters Specifications: Material: ABS Weight: 30g Size: As shown in picture Note: 1. Please allow 1-2cm errors due to manual measurement. Ensure you are comfortable with this before ordering. 2. Due to differences between monitor displays, the picture may not reflect the actual color of the item.