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 Hot Tub Compatible With Master Spas Pillow - Generic Charcoal Grey Flat Pillow Starting in 2009 HTCP8-05-0094 / X540720 / MASX540720