... : black Material: slate Food safe slate stone coasters and placemats/coasters and placemats 1.Product Info.ColorBlack Dimension10*10cm, 30*40cm ... products widely used in coffee shops , pubs , hotel , restaurants and office,available for souvenir , promotion , gift etcPacking1, every piece ... surface and back with barcode.we can also do sand blasted or printed logo. 3, 4 white paper protecting angles ...