Plug to seal off one end of a ECV100 35066 air filter.

I use this plug to replace a "hard to find" air filter with an "easy to find" air filter. I use this on the intake on my air compressor.

This will also plug other 0.8" holes

Get these filters on EBAY for less than $2 each

http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&_nkw=35066&_sop=15