This filter fits many hot tubs commonly available in the UK, including: Aegean - LPS and XLS series spas. Single filter for standard skimmers, two filters for wide mouth skimmers American Spas Inc Barrier Reef Spas - 2005 onwards Canadian Spas - Toronto, Hamilton, Winnipeg, Ontario, Alberta, Yukon Catalina Spas. Single filter for standard skimmers, two filters for wide mouth skimmers Elite Spas Gulf Coast Spas Insparations Spaform SpaServe Trade Price Hot Tubs Vita Spa