100% SUITABLE FOR CPAP MACHINE Quick Installation and Easy to Use Recommended 6-Month Replacement: Replace filters and valves every 6 months for optimal performance. Universal Compatibility: This filter replacement kit is exquisitely designed for compatibility with SC1200 and SC2 machines, offering the same performance as the original. Easy Installation: Easily replace old or damaged filters without tools and risk of leaks. Easy to Carry: Compact, exquisite, and lightweight for convenient portability. Material: Plastic Color: Gray Package Contents: 4 x Filters 4 x One-Way Valve Assemblies Note: Only the above package content is included; other products are not included. Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowable measurement error is +/- 1-3 cm.