Water Bottle Pre-Filter is to be used with the SteriPEN Ultraviolet Water Purifier. When clear water is not available, use pre-filter until water is clear, then treat with SteriPEN. For use only with Nalgene 32 oz. wide-mouth bottles.
- Removes particulates and protects against water bottle recontamination.
- Easy storage on bottle, and creates a water-tight seal when used properly with the SteriPEN Water Purifier.
- Size: 2.7" diameter.
- Weight 1.5 oz.