The SteriPEN Pre-Filter filters fits on Nalgene® and other 32 ounce wide-mouth water bottles and filters out particulates and debris. When in use, pour water through the durable 40×40 micron screen filter cartridge to fill the bottle. Then you’re ready to purify the water with a SteriPEN UV water purifier. Remove the filter cartridge from the Pre-Filter, insert the SteriPEN into the center of the filter, flip the bottle, and agitate the water until the SteriPEN indicates the treatment is complete.
- Size: 1.85 in. (47mm) x 2.6 in. (67mm)
- Weight: 1.5 oz (43g)
- 40 micron durable nylon screen
- Reversible cartridge for compact convenient storage
- Dual water seals to prevent contamination of drinking surface
- Used with Nalgene® and other 32 ounce wide-mouth water bottles