Model    Package        P.S/cm            G.W/kg      N.W/kg  
S1812  1PC                68*18*33       8.5kg        7.5kg  
S1814  1PC                77*18*36       9.5kg        8.5kg  
S1816  1PC                84*18*40       10kg          9kg  
S1818  1PC                96*18*46       12kg         10.5kg  
S1820  1PC               102*18*50      13kg         11.5kg