Brand New Oval With Polished Sides and Satin Top with Polished Finns Valve Cover Breather Kit With Grommets. This breather set will fit all 1-1/4 Inch valve cover openings. Will not fit factory valve covers with 3/4 Inch openings. Included grommets reduce to accept 7/8 Inch stem. These breathers easily come apart for cleaning. Perfect for your Rat Rod, Hot Rod, Muscle Car, Gasser or Custom Car project.