Model               Per Package     P.S /cm                     G.W/kg          N.W/kg  
B4812              1PC                   68*18*33                 8.5kg            7.5kg  
B4814              1PC                   77*18*36                 9.5kg            8.5kg  
B4816              1PC                   84*18*40                 10kg             9kg  
B4818              1PC                   96*18*46                 12kg             10.5kg  
B4820              1PC                   102*18*50               13kg             11.5kg