The unicel 6ch-940 hot tub filters replacements.

Specifications:
This Unicel 6CH-940 Replacement Spa Hot Tub Filter Cartridge Compatibility of models like the 03FIL1400, 25252, 378902, or PWW50, this is the right cartridge for you. Swap out used Filbur FC-0359, PWW50P3, and Unicel 6CH-940 filter cartridges and replace with this new one on a regular basis.

Material: Dacron material.
Item color: blue, white.
Length: 240mm.
Diameter: 150mm.
Top Hole Opening Diameter: 30mm.
Bottom Hole Opening Diameter: 30mm.

Features:
These washable and re-usable foam filters will reduce your costs. Initial cost of this cartridge is slightly more than a paper cartridge yet will outlast a cartridge by a long way This Foam filter will outlast your paper cartridges and can be washed and re-used several times over.
Advises changing a paper cartridge each week,whereas these foams can simply be washed and put back.

Package Included:
4*6*8 Filter cartridge set type I

Please Note:
3. Manual measuring, please allow 1 ~ 3mm error, thank you.
4. Due to the difference between different monitors, the picture may not reflect the actual color of the item.