aims to design, develop and sell high-quality, cost-effective water filtration products. Our company is committed to household water filtration. All products are manufactured under the technical support of our experienced team of product experts. Made of 100% Pure POLYPROPYLENE. The string wound water filter have a deep bed filtration function,which It presents honeycomb structure of being dense inside and sparse outside.The String Wound sediment filter can reduce 99.99% sand, scale, rust, sediment, particles.