Micron filters are available in various types and capacities. Generally these are used after the above coarse filters so that the life is increased. These come in 50, 25, 10, 5, 1, 0.5, 0.2 and 0.1 micron rating. These are either absolute or nominal type. Nominal means 90 - 95 % particulate matter is trapped and absolute means 100 % particles are trapped. These come in various materials like PP, RBC, sintered, and SS. The weaving is also different like spun, wound, pleated, and grooved. These are widely used in pharmaceuticals, mineral water plants, pre-treatment to RO plants & point of use systems.