Provides clean and clear water by introducing our Type VI filter cartridge D.I.M: 4.1 x 3.1", for all spa models using Type VI filters, compatible with Bestway, Lay-Z-Spa, Coleman and SaluSpa Premium quality dacron fabric collects hair, leaves, dust, sediment, sand, etc; easy to clean and replace For best results, clean filter cartridges often and replace every few weeks if used heavily 100% satisfaction products and worry-free customer service from Volca Spares