Spa Hot Tub Filter PRB50IN FC2390 C4950 40506 SLF50-5-13 RD50 8510 SPA1004.
Pleatco Reference PRB50IN. Darlly Reference 40506. Great Barrier Filter Reference 8510. Filter Manufacturer. This is a very common filter that should fit Sun Ray Spas. Southwest Spas. Signature Spas.