Chemical : Sodium Dichloroisocyanurate (SDIC)
Ingredient :SDIC: 56%/60% 
Appearance : Granule/Tablet
Features :It is used to replenish the chlorine level in pool. Shocking actually restores your chlorine’s “fighting power” and makes it safe to swim again. For the control of bacteria and algae in swimming pools.
Size:
0.5kg(or 1lb),1kg(or 2lb),2kg(or 5lb),3kg,4kg(or 10lb),8kg and 10kg of Pillow Bags,Doy Packs,Gusseted Bags and etc.
0.5kg (or 1lb),1kg (or 2lb),2kg (or 5lb),3kg,4kg (or 10lb),8kg and 10kg of Pails, Jars, Jugs,Pots,Tubes,Drums and etc. 
25kg or 50lb bags