Our Hydroponic extractor bags our compatible for use with five gallon buckets or tubs. Bags are labeled and color coated with corresponding micron rating. This bag assortment allows for more exact filtering into different grades. Purple - 25 Micron, White - 45 Micron, Yellow - 73 Micron, Black - 90 Micron, Orange - 120 Micron, Red - 160 Micron, Green - 190 Micron, Blue - 220 Micron. This kit also includes a free 25 Micron pressing screen.