The product is a set of 6 Lay-Z-Spa Filter Cartridges Type VI, designed for use in Bestway hot tubs. Made by the brand QPRO, these cartridges are easy to install and clean, with an inner diameter of 52mm and dimensions of 104mm x 80mm x 104mm. Manufactured in China, these filter cartridges are specifically suitable for hot tubs and provide a convenient solution for maintaining water clarity and cleanliness in your outdoor spa.