The twist lock carbon block cartridge ONLY fits the Stealth Flex Twist.
FILTER MEDIUM: Activated Solid Carbon Block 0.5 Micron
REDUCES: sediment, chlorine taste and odor, VOCs, NSF 41 emerging contaminants, lead, mercury, and other chemical contaminants**
CAPACITY: 1000 gallons or 6 months
Made in USA
**Will not remove heavy metals or toxins.