Spa Hot Tub Filter RD50 PRB50IN FC2390 C4950 40506 8510 SPA1004.
Pleatco Reference PRB50IN. Darlly Reference 40506. Great Barrier Filter Reference 8510. Filter Manufacturer. This is a very common filter that should fit Signature Spas. Jacuzzi J200 series. Hydro pool Spas.