100% APPROPRIATE FOR CPAP MACHINE 2Quick install and easy to use Recommend 6 Month Replacement:It is advised to replace the filter and valve every 6 months. Universal Compatibility: Filter Replacement Kit is using an exquisite design, perfectly compatible with SC1200 and SC2 machines, featuring the same effect as the original. Convenient to Install: CPAP Filter Kit is used to replace old or broken filters, is easy to install without additional tools, and without risk of leakage. Easy Carrying: CPAP Machine Filters are no need to specially prepare a storage bag for them, small, exquisite, lightweight, and easy to carry out at any time. Material: Plastic colour: grey Package Contents: 8 x Filter Elements 8 x Check Valve Assembly Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!