Darlly Cartridge [100 sq ft, 3-5/8" OD Bottom x 8" dia x 16-1/2" L] (81004) aquapro A bolt kit is useful

A bolt kit is useful because it helps secure the header assembly correctly

the entire opening can feel less secure and less finished than it should

Improves return-side performance and installation finish

A complete unit like this is useful because it combines skimming

The V38-185S is a strong service choice when a compatible UltraFlow assembly needs a more serious basket upgrade as part of a higher-quality repair

Darlly Cartridge [100 sq ft, 3-5/8" OD Bottom x 8" dia x 16-1/2" L] (81004) aquapro A bolt kit is usefulThe Darlly 81004 filter cartridge is designed for compatible filtration applications and offers 100 square feet of filtration area with 3 5 8 inch bottom opening, 8 inch diameter, and 16 1 2 inch length. A cartridge like this is useful because it restores filter performance while matching the original shorter body cartridge design required by the housing. When one end dimension or opening style differs from more common cartridges, careful matching