20 Gallon Bubble Magic Extraction Bags (set of 4)Make essential oil and do other plant extractions using Bubble Magic extraction bags. They are made using a unique and durable black canvas. All the seams are double stitched using powerful nylon thread. These extraction bags consist of a micron screen along with the lower layer. The package comes in a set of 4, and each set has its own carrying bag (black). What Does the Package Include? 220 micron bag 160 micron bag 73 micron bag 25 micron bag