99% Laboratory Grade A Isopropyl alcohol; 1 Liter. The absolute strongest cleaner for any stains or very sticky/hard to remove spots. Best for cleaning Glass Pipes, Bowls and anything else containing resin! We carry 3 different sizes with great pricing for the concentration level of isopropyl; Pints, Liters and Gallon size for the best deal! Every gallon comes with a free pack of salt.