The Coway WJMF11-NF-S NF Membrane Filter is an 11″ polysulfone and polyamide nanofiltration membrane. It has been certified by WQA to NSF/ANSI Standard 42 and should be replaced every 24 months.

Features:

• Material: polysulfone and polyamide
• Should be replaced every 24 months
• Certified by WQA to NSF/ANSI Standard 42