This foam air filter is a genuine part for Briggs and Stratton lawn mowers. It is compatible with models 09P602, 09P702, and 550E-550EX, and is designed to keep your lawn mower running smoothly. The filter is made from sponge material and comes in a yellow color. It is easy to install and comes in a bag for easy storage. This air filter is a single item and is 4.25 inches in length, 3.25 inches in width, and 1 inch in height. The filter is made in the United States and is a high-quality replacement for your Briggs and Stratton lawn mower.