Series 2: Four-piece Italian Botticino Marble Display Coasters. These heavy marble slabs have high-def Iconic 9/11 Museum images printed on them for a one-of-a-kind display piece. Series 2 features 'FDNY Honor Guard' - 'WTC Steel Facade & Firetruck' - 'The World Trade Sign' and 'NYPD K-9 Recovery Dogs'. Each tile measures 4 in. x 4 in. Each tile has natural imperfections that come with real Italian marble. For a limited time, the corked bottom of each set has one coaster hand-autographed by the Official Photographer at Ground Zero. Presented in a beautiful gift box.