Filters wide mouth bottles;40 micron durable nylon screen;Reversible cartridge for compact convenient storage;Dual water seals toprevent contamination of drinking surface;Used withNalgene and other 32 ounce wide-mouth water bottles

• SteriPEN SP-PF-I Pre-Filter for Wide- Mouth Water Bottles Transparent / Blue
• One Size
• transparent und blau

SteriPEN SP-PF-I Pre-Filter for Wide- Mouth Water Bottles Transparent / BlueSteri Pen