Also compatible these filters: Hot Spring Spas (Watkins), Tiger River Caspian model CHP/Bengal model M/Sumatran model N, Watkins Mfg/Hot Spring Spas, Watkins Mfg/Tiger River Spas, Caldera Spas, Hot Spring Classic, Sovereign, Limelight Spa Flair/Pulse/Glow/Bolt, Hot Spot Relay/Tempo Aladdin 16506 | Baleen AK-7007 | Darlly 80651 | Excel Filters XLS-810 | Filbur FC-3960 | Magnum HS65 | Pleatco PWK65 | Pleatco PWK45N | Pure N Clean PC-3960 | SD-00541 | Unicel C-8465 | OEM 31114 | OEM 71827 | OEM 71828 | 65 Square Foot Hot Springs Spas / Watkins Mfg