Spa filter dimensions: 107 mm (diameter) x 28 mm (inner diameter) x 95 mm (height) This high-quality hot tub filter removes excess dust and dirt, optimizes pump performance, and extends the equipment's lifespan. The filter's function is to filter the pool water so that leaves, insects, and debris on the surface do not settle to the bottom. For best results, clean the filters frequently and replace them every few weeks during heavy use. Note: Please confirm the size is suitable for your equipment before purchasing to avoid any issues. Type VII and Type D filter cartridge: outer diameter: 10.7 cm, inner diameter: 5.2 cm, height: 9.5 cm. Filter cartridge compatible with Bestway VII and Intex Type D pools and hot tubs. The hot tub filter effectively solves the problem of water purification and filtration, keeping it clean and preventing contamination and the spread of disease. The powerful propulsion of the hot tub filter effectively removes hair, leaves, dust, sediment, sand, etc. Specifications: Material: Polyurethane and non-woven fabric Size: 107 mm x 52 mm x 95 mm Package contents: 2 units