Hydro Crunch 5 Gallon 8-Bag Herbal Ice Bubble Hash-Bag Essence Extractor Kit Hydro crunch extractor bags are color and labeled to the correspondence microns High quality screens are made from mono-filament The 5 gallon 8 bag kit allows you to separate your herbal into 8 different grades of high quality concentrates (1)Purple=25Micron(2)White=45Micron(3)Yellow=73Micron(4)Black=90Micron(5)Orange=120Micron(6)Red=160Micron(7)Green=190Micron(8)Blue=220Micron Bubble extraction bag is made of long lasting nylon material, prevents from flaking and chipping after several uses.