Pentek 151120 Buna-N O-ring for Standard & 3G Standard Housings

• O-ring for sealing water filter housings
• Fits PentekStandard and 3G Standard housings
• Buna-N for flexibility and abrasion resistance

I ordered four rings at the same time and each was sent out separately. I believe shipping was charged each time.The rings were shipped in a padded envelope and shipping totaled $21.95. For the four rings which totaled$ 7.72 I felt this was unnecessary and a little much. But they are here and I don''t have to look for them anymore.

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Makes a water tight seal. I''ve only had it in use for a short time so I don''t know how many filter changes I''ll get before it wears out.