6 OF 1 MICRON SEDIMENT PP WATER FILTER CARTRIDGES BY AQUABOON Sediment filter is made of fine melted polypropylene, which is blown and spun in a cylinder-like form.The main function of sediment filter is to remove large and fine particles from a drinking water, such as sand, dirt, silt, and rust particles.Each cartridge is individually shrink-wrapped.Sediment Filter is Melt Blown with thermally bonded 100% Pure POLYPROPYLENE Microfibers.Universal Industry Standard size of 10" by 2.5" and is compatible with most industry standard RO Filter units.Features: * Micron rating: 1 Micron * Dimensions: 10" x 2.5" * Lifetime: Replace two or three times a year, depending on the water quality that comes from the original supply.* Gradient Density, Multi-Layered, Melt Blown Sediment Filter Cartridge.* Larger particles are trapped in the outer layers; smaller particles penetrate deeper.* Greater dirt holding ability and longer life than non-layered cartridges.* Thermally bonded polypropylene micro fibres for purity and chemical compatibility * Contains no binders, agents, solvents, antistatic materials or wetting agents * No surface binders to reduce flow and increase change-out frequency * Cartridge is individually shrink wrapped How it works.* Innermost Zone - small dust is filtered in the following layer to ensure the good filtration efficiency.* Inner Zone - Small particles pass the outer layers, then filtered by inner layers, which made out of the fine fibre.* Mid Zone - Multilayered structure layer and depth filtration pattern of the mid zone layer ensures good filtration efficiency and formed by thermal bond without use of any binders and adhesives.* Outer Zone-The large dusts are filtered in following layer to prolong the filter service life.