If you click the list box, you will see a range of different concentrations for both the togo and 30ml sizes - These are the strengths Androtics offers - That is all.
Once you have found your effective dose, it may be you will decide to order a higher concentration to minimise the number of sprays you need, or if you are into mixing, a higher concentration may interface with other components in your mixes.
Thanks for the replys everyone. I will go with the standard instant line to start with. I was just reading around the forum to learn more and came upon this and couldn’t find an answer on my own. I had guessed it would be this, but i am not the kind of guy that likes to assume!