Black standard crowns. These Black Crown Beer Bottle Caps (144/pk) have a 26 mm neck width and an oxygen absorbing cap liner. A necessity for all beer bottles, use these crimped edge beer caps to top off your bottle and reduce oxidation to keep your brewed beer tasting the way it should. These crown caps have double secure sealing lips and are applicable for breweries or homemade brews. They are perfect for sealing up your unfinished drink.