Open end of a cylindrical air filter element showing inner mesh…

End-on view down the open bore of a large cylindrical air filter element, showing the black rubber sealing end cap, the outer expanded-metal screen and the inner perforated support tube with a four-spoke cross brace. It is set on a patio in the sun with a barrel cactus and block wall behind.

AI caption March 2010 · Photo 565 of 994