2 PACK FITS: C6433 UNICEL C-6433 6433 FC-3920 PWK35 WATKINS HOT SPRINGS
Also replaces the following filters: Hot Spot Spas Watkins Mfg. Watkins Hot Spring Spas---- Unicel - C-6433 (C6433)---- Filbur - FC-3920 (FC3920)---- Pleatco - PWK-35 (PWK35)
Also replaces the following filters: Hot Spot Spas Watkins Mfg. Watkins Hot Spring Spas---- Unicel - C-6433 (C6433)---- Filbur - FC-3920 (FC3920)---- Pleatco - PWK-35 (PWK35)