Replacement air filter for Honda generator EU2000 / EB2000 using part numbers 17211-Z07-000 and 17218-Z07-000. they are shipped un-oiled; add 1-2 cap fulls of oil to the filter and squeeze/work it for a minute in the supplied bag, then install. This is a complete filter set consisting of 2 filters. The first is a small pore foam filter, meant to trap dust; this installs closest to the carburetor. The second is a large pore filter, meant to catch larger items like sawdust and hair, and installs next to the first. Both should be oiled.