Feature 1) Compatibility: Our 74316 hot tub spa pillows fits the following HotSpring Spas models: Aria AR 2007-2013, Envoy KK 2007-2013, Grandee G 2007, Grandee GG 2007-2013, Jetsetter J 2008-2010, Jetsetter JJ 2007-2013, Sovereign I 2007-2013, Sovereign II 2007-2013, Vanguard V 2007, Vanguard VV 2007-2013, Vista Summit SS 2007-2013. This pillow is not backward compatible (will not work with older models). .
