... others 3) Finished product thickess:5~20mm or others Shell Thickess:1.5~2mm4) environmental ,no radiation, no ... to body5) low water absorption, high waterproof6) Backing: Mesh, Ceramic, Porcelain, Marble, PVC, Magnesium oxide, Cement board , postercloth ... natural shells, such as mop shell, ablone shell, Chinese river shell, black MOP , yellow MOP , pink Shell, pen Shell etc.8) Processing technic: ...