Standard Rating : 1, 3, 5, 10, 25, 50, 75, 100 um Extra Clean Plus Rating : 0.2, 0.45, 1 um Material : 100% PP melt-blown micro fiber Length : 10″, 20″ Outer diameter: 130 mm Inner diameter : 51 mm Application: High flow rate filtration in TFT-LCD, Color filter