Milliard 1 Gallon Extraction Bags - 3 Bags (Orange, Blue, Red) Different plants produce varying crystallized solids when strained. This kit strains progressively from coarse to fine so you can separate your yield for potency. Bags are labelled with micron count and are color-coded to identify them easily. The extraction bag system is designed to last for hundreds of uses. Flexible waterproof cord included inside each bag with triple-stitched seams for added strength. Includes three extraction bags, each with one gallon capacity.