Part Number:HTCP8-05-0094 / X540720 / MASX540720 Compatible Models: Clarity Spas 2013-14: CLS1055, CLS855L, CLS855, CLS738L, CLS738, CLS730L, CLS730, CLS524, CLS415 Contractor Series 2010-12: CS415, CS862, CS743, CS742, CS738, CS730, CS866C, CS862C, CS7421, CS738L, CS730L Down East Series 2011-12: Cape Cod 2, Windsor 2, Exeter 2, Portsmouth 2, East Hampton 2, Somerset, Windsor STSH2X Swim Spas 2010-14: Trainer 19, H2X Momentum, Trainer 17, Trainer 18 Compatible Models: Legacy Whirlpool 2010-2014: Inspire SE, Enterprise, Intrepid, Inspire, Envision, Enterprise Michael Phelps Swim Spa 2012-14: Signature S, Signature, Momentum 50, Momentum 80, Impact, Force Twilight Series 2009-2014: TS67.25, TS MP, TS8.1, TS8.3, TS8.2, TS7.2, TS7.1, TS6.2, TS6.1, TS240, TS120, TS FIT, TS8.35, TS8.25, TS7.25, TS7.15, TS67.15 High quality:This product is made of high quality materials, comfortable, soft ，Enjoy countless hours of relaxing and make sure that this pillow pad and backrest can stand the test of time Service:If you encounter any problems during use, please contact me immediately and we will give you a satisfactory XQK 4 Pack Hot Tub Compatible with Master Spas Pillow - Generic Charcoal Grey Flat Pillow Starting in 2009 HTCP8-05-0094 / X540720 / MASX540720. Part numbers HTCP8-05-0094 X540720 MASX540720 headrest pillow fit for Clarity spas pillow headrest 2013-2014, fit for Twilight Series Spas headrest pillows 2009-2014 ( TS67.25, TS MP, TS8.1, TS8.3, TS8.2, TS7.2, TS7.1, TS6.2, TS6.1, TS240, TS120, TS FIT, TS8.35, TS8.25, TS7.25, TS7.15, TS67.15 ), fit for Contractor Series Spas headrest pillows 2010-2012, fit for Down East Series Spas pillow headrest 2010-2014, fit for H2X Swim Spas headrest pillow, fit for Legacy Whirlpool Spas pillow headrest 2010-2014, fit for Michael Phelps Swim Spas pillow headrest 2012-2014, fit for Hampton and East Hampton spa headrest pillows; fit for Trainer 17/18/19 headrest pillow, fit for Momentum 50/80 spa headrest pillows, also fit for Inspire SE, Enterprise, Intrepid, Inspire, Envision, Enterprise Michael Phelps Swim Spa 2012-14: Signature S, Signature spa headrest pillows. The pillow is ergonomically designed to perfectly fit the head and cervical spine, effectively relieving neck pressure and truly achieving relaxation. The back of the pillow is with a double-needle design, which can be easily installed without any tools and without any pressure. The pillow is made of high-quality materials, providing excellent support. The material has a high density, making it less prone to shedding and deformation compared to ordinary, ensuring a longer lifespan.