100% APPROPRIATE FOR CPAP MACHINE 2Quick install and easy to use<br> Recommend 6 Month Replacement:It is advised to replace the filter and valve 6 months.<br> Universal Compatibility: Filter Replacement Kit is using an exquisite design, perfectly compatible with SC1200 and SC2 machines, featuring the same effect as the .<br> 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.<br> Easy Carrying: CPAP Machine Filters are no need to specially prepare a storage bag for , small, exquisite, lightweight, and easy to carry out at any time.<br> Material: Plastic<br> colour: grey<br> Package Contents:<br> 6 x Filter<br> 6 x Check Valve Assembly<br> Only the above package content, other products are not included.<br> 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.