Only two available! These 4" round petri's can be displayed on a small plate holder as a piece of art on your mantel or they can be used as a coaster (no very hot liquids as Art Resin isn't intended for extreme heat tollerance), or used as a paperweight on your desk. They are pretty to look at and they make great gifts. They are made with solid resin and alcohol inks, and sometimes glitters or paints and pigments. Price is per petri.