# N-filter questions

**URL:** <https://forum.gbfans.com/t/n-filter-questions/34748>\
**Category:** Proton Packs\
**Created:** [August 22, 2010, 11:05pm UTC](https://forum.gbfans.com/t/n-filter-questions/34748 "2010-08-22T23:05:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ctiggerrun](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/c/6de8d8/32.png) [@ctiggerrun](https://forum.gbfans.com/u/ctiggerrun)\
**Post date:** [August 22, 2010, 11:05pm UTC](https://forum.gbfans.com/t/n-filter-questions/34748/1 "2010-08-22T23:05:43Z")

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Hey all, I’ve been lurking around looking at all these beautiful packs being made and am going to try my hand at one. The question I have concerning the [N-filter](https://www.gbfans.com/wiki/equipment/proton-pack/n-filter) is with Stefan’s plans. It looks like the n-filter is slightly hanging over the edge of the spacer. I definitely have some over hanging on mine but my n-filter has a 3" outside diameter.

Has anyone else out there noticed this over hang? If you have an n-filter that’s 2.75" on the outside diameter do you notice it as much? what have you been using to get as close as you can to the correct size?