... size(mm)randomproduction thickness3~5mmshell size(mm)300*300 or otherscolornature shell colorshapeSquare , rectangle , irregularfeaturesenvironmental , no ... waterproof6) Backing: Mesh, Ceramic, Porcelain, Marble, PVC, Magnesium oxide, Cement board , postercloth etc.7) Material: can be made ... technic: close, net sieve, microcrack, seamless, or filling etc9) Can be made according to customers' ...