Intex 77in PureSpa Portable Bubble Massage Spa Set The built-in hard water treatment system makes water gentler on skin for a soothing experience An insulated cover and lock is included to minimize heat loss and provides an added safety feature PureSpa provides simple maintenance with 2 easy-to-replace filter cartridges for clean refreshing spa water Age Grading : 6+. Includes: Heating system, 3-way test strip, 2 filter cartridges, floating pool chlorine dispenser, thermal ground cloth, inflation hose, carry bag Seating capacity: 4 people; Water capacity: 210 gallons; Water temperature range (68 Degrees - 104 Degrees)