Superflock. The size of this product is 8 x 1Kg. (That's over a years supply for most domestic pools!) Superflock is ideal for using with Bayroklar Duo tabs or Bayrosoft liquid as a floculant which helps to maintain sparkling clear pool water. Always read and adhere to the instructions on the pack and never directly mix chemicals. Don't forget, the price you see is the price you pay not a penny more. We sell chemicals cheap, not cheap chemicals!