Solaxx Resliance cells are not interchangeable between different sizes. The power center controls a specific size cell for the unit.
Comes with unions

Replacement for the SCC-40 Model A7
The A7 model boasts a chlorine production rate of 2.07 lbs. per 24 hour day, and is suited best for pools and spas up to 60,000 gallons. Where heightened chlorine demand exists due to warmer climates, high bather load, etc., the maximum pool size should be reduced by 30%.

1 year manufactures limited warranty