Image not available yet 1550 Cartridge for Whisper 4 /5 , Tetratec, PF500, Made in USA by Ginger Products. Single factory pack. Cartridges contain 1/2 again the carbon of most cartridges for longer effectiveness at removing contaminants. Email us for a free sample cartridge.

If you want to test one out, email and request a sample. We will cheerfully send you one! This item is also available for less money in bulk pack, items 1551 and 1552.

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