... background,hotels, etc. 2:Environmental 3:Natural river shell 4:Finishing:polished 5.OEM productionNatural shellShell Size( ... or others Shell Thickess:1.0~2.0mm 4) environmental ,no radiation, no pollution ,no harm ... .7) Material: can be made by kinds of natural shells, such as mop shell, ablone shell, Chinese ... : carton Freshe water shell mosaic, natural white and dyed brown mixed checker pattern