This listing is for 2 pieces of American Olean Crystalline  Cobalt Square Ceramic Tile size 4-1/4". Manufacturer's catalog number 345. Made in USA, 1960s 70s 80s 1990s. Also have in Octagon, Hexagon, scored versions SD-5 and SD-1. Have various trim pieces also.  Note: As with all ceramic tile, the numbers on the back, have ABSOLUTELY nothing to do with the color, they are from the dies that made the blank bisque before glazing. Brand New Tile, no warranty expressed or implied, check for your application, measures 4 1/4 inches square, shipping 48 USA ONLY, save on shipping if buying more than 1 set of tile, thanks for looking. Lansdale USA Dal daltile AO Mohawk Shipped with USPS Small flat rate box. Armstrong National Gypsum