Model        Per Package     P.S/cm                 G.W/kg             N.W/kg  
B1812       1PC                 68*18*33               9kg                  8kg  
B1814       1PC                 77*18*36               10kg                9kg  
B1816       1PC                 84*18*40               10.5kg             9.5kg  
B1818       1PC                 96*18*46               13kg                12kg  
B1820       1PC                 102*18*50             14kg                13kg