6-packs direct replacement for cartridges used in 

General 1A-25A, 

Unifilter 77, 

Sid Harvey XF-25,

 Sears 8055,

Eddington S-254, 

Westwood S-254,

Autoflo F-300, 

 Federal A-77.

Gear tooth design provides 25% increase in filtration surface area and allows collection of contaminant particles 

in nearly the full depth of the filter. 

Constructed of high density, 

continuous spun Rayon fiber material.