GAME 4721 SolarPRO Curve Solar Pool Heater for Intex & Bestway Above Ground and in Ground Pools (Includes Intex Adapters) Unique Curved Shape maximizes heat. Heats 5 degrees Fahrenheit in 4 days Durable construction with commercial grade collectors Threaded ports for versatile plumbing options Includes 2 hoses and stainless steel hose clamps For in ground pools (Multiple units may be needed)