This purchase includes 7 quarts of liquid foam solution for creating the best launcher effect. Use 1 to 2 quarts per 50gal of water used. The sock attachment for the Super E Foam Machine creates a launching effect that sprays foam over a crowd. Simply remove the original Super E Mesh Sock from the machine and replace with this velcro launcher sock. This changes the effect of the foam being thrown from the Super E Foam Machine. The fan needs to be tilted straight out or slightly up in order to throw the foam bubbles.