OUTSTANDING ADVANTAGES - Compared to melt blown filter , string filter is to filter water with lots of sediment. FOUR times dirt-holding capacity, DOUBLE flow rate, LONGER service life than pp sediment filter. STANDARD DIMENSION - universal string wound filter fits most 10 inch filter housings,as prefilter of reverse osmosis(RO) systems and whole house water filtration, as well as variety of commercial and industrial applications - 6 Pack FUNCTION - 99% particles, silt, sand, rust and other undissolved particles in dirty water. As the first line of in the filtration system, your water using appliances and plumbing for cleaner water, improve water quality and taste. FEATURES - honeycomb structure increase dirt holding capacity, polypropylene material center tube increase pressure resistance.100% Polypropylene material, non- and tasteless. - For better water quality, recommended replace TWO or THREE times a year, depending on the quality of the water source and application type. Recommended change out differential pressure is 30psi(2.1bar). Colour:White Material:Cotton thread Size:25.4cm Package Contents: 12* Water Filter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.