Let your worries bubble away as you unwind in the intex pure spa plus portable inflatable hot tub and s1 easy set pool filter replacement cartridge 6 pack. The pure spa provides relaxation at the touch of a button for up to 6 people with its easy-to-use wireless, removable control panel and Intex link spa management app to control the panel using your smart device. 140 high-powered bubble jets surround the interior of the spa while the heating system adjusts to fit your preferences. This is the authentic replacement cartridge for your Intex pure spa. It works with all Intex pure spa models including 28403E, 28407E, 28443E, 28453E, 28421E, 28423E, 28413E, and 28453E. Replace your filter cartridges regularly for the best results. It is recommended that you replace cartridges every 2 weeks to maximize your spa's performance. If you've always wanted a hot tub without permanently taking up space on your patio, this pure spa plus hot tub with 6 filter replacement cartridges is a relaxation game-changer.