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The Katadyn Cyst Filter can be used to replace the old or expired cyst filter in your Exstream or Exstream XR Purifier Bottle microfilters. This 1.0 micron filter is designed to eliminate all waterborne cysts, including Giardia and Cryptosporidium. The Cyst Filter is sold in packs of two.
- Fits Katadyn Exstream and Exstream XR water bottle microfilters.
- Kit includes two 1.0 micron cyst filters.