The ingredient is as follows:
Block dimension(mm): 155 x 155 x 40
Compression ratio:  5:1
re-hydrated yield (litres): 4.75
Electrical Conductivity (mS/cm)  <0.7
Ph: 6.37
Ah: 3.33%
Micronutrients: OK
N: 0.555% P2O5: 0.333%   K2O: 0.743%