... mm)randomproduction thickness3~5mmshell size(mm)300*300 or otherscolornature shell colorshapeSquare , rectangle , irregularfeaturesenvironmental , no harm to bodyno ... others 3) Finished product thickess:5~20mm or others Shell Thickess:1.0~2.0mm 4) environmental ,no ... shells, such as mop shell, ablone shell, Chinese river shell, black MOP , yellow MOP , pink Shell, pen Shell etc. 8) Processing technic ...