This is for 4th stage Replacement RO membrane; replaced every 2 to 3 years,  part no.  3150

Applicable Models: KOOLERMAX AR-122, AR-125, HK-120

TFC-150  High rejection TFC membrane we use genuine US MEMBRANE membrane filter, 150 gal/day, it removes 96% to 98% of all chemical, dissolved solids in tap water. (replace every 2 to 3 years). 

Our 150 GPD membrane fits all standard residential style membrane housings.

Made in USA.