These high quality extraction bags (used in the making of essential oils) are completely made out of mesh screen and are double-stitched with extra-strong nylon thread. Being made completely from the mesh screen, these bags drain extremely fast making for a much quicker work time. All Mesh Bubble Magic Bags are available in 5 gallon and 20 gallon sizes. Micron sizes: 220, 160, 120, 73, 25