http://tinyurl.com/pp3fd5q<P>Stens 100-139 Air Filter Replaces Ryobi 180350Product Review<P> Click on the link for more reviews<P>Inside Diameter 1-1/4-inch; Outside Diameter 2-1/4-inch; Height 7/8-inch<P>Foam air filter<P>Stens part number 100-139<P>
