New replacement filters for 2020 MSpa's. Use with the MSpa Starry Delight, MSpa Tuscany, MSpa Alpine, MSpa Mont Blanc, MSpa Baikal & more. Simple fitting & genuine direct replacements from MSpa. Use with previous MSpa Models For first time, make sure you purchase both base (Not Included B0302950) & filter cartridge (B0302949). After that, you just need to purchase filter cartridge (B0302949) each time as you will have the base already. Using these filters helps the pump run smoothly & efficiently. Easy to remove & replace from the filter housing. It is recommended that you change the filters every 2-3 weeks; however this may become more frequent depending on how often you use your spa. The filters include a Filter Cartridge & a Cartridge Base.