... bathroom, TV background,hotels, etc. 2:Environmental 3:Natural river shell 4:Finishing:polished 5.OEM productionNatural shellShell Size(mm)10×20mmproduction ... :5~20mm or others Shell Thickess:1.0~2.0mm 4) environmental ,no radiation, no pollution ,no harm to body5) low ... of natural shells, such as mop shell, ablone shell, Chinese river shell, black MOP , yellow MOP , pink Shell, pen Shell etc ...