Here's what other sites are saying:
Keep your Katadyn Guide Filter running at optimum efficiency. Periodically replace the filter element with this replacement cartridge.
- Appalachian Outdoors
Replacement cartridge for the popular Katadyn Guide™ Microfilter. The Katadyn Bottle Adaptor for Guide Microfilter is designed for use with Katadyn's Guide Microfilter. This Bottle Adaptor fits most wide-mouth water bottles.
- Vargo Outdoors
The Katadyn Guide Replacement Cartridge is the replacement element for the Katadyn Guide Water Filter. It now comes with a 50 micron membrane to filter out particles larger than 50 microns. It's always a good idea to pack a second element when you head to the backcountry.
Replacement filter element for Katadyn Guide microfilters.
Katadyn Micro Replacement Cartridge
$25 - $44
Katadyn Mini Replacement Cartridge
Katadyn Pocket Replacement Cartridge
Katadyn Vario Replacement Cartridge
$15 - $44
Katadyn Ultra Flow Replacement Cartridge
Katadyn Hiker/Hiker PRO/Base Camp Replacement Element
$37 - $49
Katadyn Combi Replacement Element
$100 - $119
Sawyer Water Filter Squeeze Pouch