-Brand: Hydropure - Food-gradge Polypropylene fibres are designed for sediment removal from potable water.- Filter Specifications: Nominal micron rating: 1 um, 5 um, 10 um.20um,- I.D. ~ 1 1/16" (2.7cm)- O.D. ~ 2 1/2" ) (6.4 cm)- Length 10", 20", 30", 40"Hydropure Sediment Filter Catridge- Ideal for your water purifiers, water refilling stations, and water fountains.- Melt Blown Polypropylene Fiber Cartridges are made of FDA grade material of Polypropylene fiber. No binder, lubricants or anti-satic agents are used in process.- The cartridges are designed for high flow rates with minimum pressure drop and provide exceptional chemical compatibility to handle a wide range of process fluids