Push-in breather oil baffle grommet is designed for use with valve covers that do not have an oil control baffle system. This is made from oil-resistant rubber and will fit into any valve cover with 1-1/4" diameter push-in holes. Angled slots in the bottom and foam insert stop oil seepage. These breather oil baffle grommets will not clear stud girdles. Outer Diameter: 1-1/4". Inner Diameter: 3/4".