Replacement cartridge for the Coleman inflatable spas (models 54131E and 13804) Vegas, Miami, and Monaco Contains 2 filter cartridges Easy to clean Item Number: 58323 (58239 compatible) Bestway Lay-Z Spa Replacement Cartridges Give your Bestway Lay-Z Spa its best performance by using these genuine Lay-Z Spa Filter Cartridges Type - VI. Filter the water in your spa to keep it attractive and refreshing all season, it is recommended to change the filter regularly. Replacement cartridge also compatible with the following Coleman brand inflatable spas: - Vegas, Miami, and Monaco Lay-Z Spas