Finest-Filters 4 x Hot Tub Spa Water Filter Cartridge Replacement Compatible With Pleatco PRB50IN, Unicel C4950, Darlly SC706, 40506 & Filbur FC2390 Hot Tub Water Filters

Perfect

Good quality

I bought these for our hot tub as replacements for some others I'd bought from another supplier which had started to deteriorate on the ends after one use. These ones though after one use and a clean still look like brand new. I got a 4 pack as they were better value but also to have the flexibility of rotation. They feel like good quality filters and do a great job of keeping the hot tub water clear so I am very pleased with the purchase.