The Pentek 255528-43 is the correct water filter cartridge for the following applications:
The Pentek GS-210RO-C-3/8" Coconut Shell Inline Filter is a replacement inline filter cartridge constructed with coconut shell GAC (granular activated carbon). This GAC water filter reduces the taste and odor of chlorine in your drinking water while also improving its taste. This coconut carbon filter features a 5 micron rating, which makes it very efficient at reducing contaminants in your water.
Pentek GS-210RO-C-3/8" Coconut Shell Inline Filter specifications: