FEATURES: Great Compatibility- The 6472-966 spas pillow fits for Sundance 780 Series Spas. Include models Camden 2007-04/2013 (4), Certa 2007-03/2017 (3), Chelsee 2007-03/2017 (4), Hamilton 2007-03/2017 (4), Dover 2008-03/2017 (3), Montclair 2013-03/2017 (3) Replacement- Repalce pillow part number 6455-469 or 6472-469. The pillow attaches to shell with Ball/Socket attachment Comfort Enhancer- Fit the natural curvature of human's head and neck. Comfortable support helps to alleviate tension in the neck and upper back, allowing users to fully relax and enjoy their spa experience .