O-Ring to fit various Slimline Filter Housings - Blue, Clear, White, Black
See pictures included to see if one matches yours! 
5 pack of O-rings $3.60 - that's $0.72 an o-ring!
10 pack of O-rings $6.80 - that's $0.68 an o-ring!
 
If you cannot find a matching housing on our website, please contact us, and we will further assist you to get you the o-ring that you need!