Perfectly Compatible Replacement: for 90352E, 58323, 58323E, 58324, 90427E filters and many others. These cartridges are suitable for all Type VI spa models with 104mm(4.1 inch) Outer diameter, 50mm(2 inch) Inner diameter, and 80mm(3.1 inch) Height. Powerful Filtration Performance: The three-leaf woven structure of the filter cloth provides higher filtration efficiency, thanks to the "Dirt-Locking" technology that captures more pollutants quickly. Premium Quality: type VI filter cartridge is made of durable High-quality materials. The expanded filter area increases dirt holding capacity without compromising the flow rate or service life. Reinforced end caps resist breakage and common pool and spa chemicals. Easy to Clean and Reuse: type VI Spa filter cartridge is designed for easy maintenance. We recommend replacing it every two weeks to maximize its performance and extend its life.<br><br>Material: plastic colour: white+blue<br><br>Package Contents: 4 x Pool Filter Cartridge<br><br>Only the above package content, other products are not included. Note: Light reflection 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.