Miele SF-HA 50 Active HEPA filter for Models S4000， S5000， S6000， &amp; S8000， 3<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Traps 99.95% of all particles as tiny as 0.3 microns</li><li>Needs to be replaced after 50 hours of use， or approximately 12 months</li><li>Designed for Miele S4 and S5 series canister vacuum cleaners</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41i06ttUK6L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51eu-Gmc9RL.jpg" noproxy>