This listing is for 5 new freeze expansion plugs for engine block/cylinder heads. Fits most Ford, Lincoln and Mercury automobiles. EASY INSTALLATION!! Just insert a socket into the cap and tap it in with a hammer. Specific Size: Fraction Decimal QTY 1-3/4" 1.7500" (qty - 5) Other sizes also available in our eCRATER store. WE SHIP WORLDWIDE!!