✔ Fine 0.00000039-inch filtration: The medical-grade hollow fiber membrane has 0.00000039-inch pores to trap micro-particles, silt, and sediment as water passes through. It filters without chemical tablets, batteries, or a chemical aftertaste.

✔ Up to 1,321 gallons per filter: Each filter is rated for up to 1,321 gallons of water, reducing the need for frequent filter replacements. High-flow suction helps keep drinking effort low, and backwashing helps clear trapped particles between uses.

✔ Compact, versatile design: The 5.31-inch pocket-sized filter can be used directly from freshwater or attached to standard 1.10-inch threaded bottles and compatible gravity setups. Its food-grade, BPA-free construction avoids the bulk of larger pump equipment.

Filter pore size: 0.00000039-inch hollow fiber membrane

Filtration capacity: Up to 1,321 gal

Thread size: 1.10-inch double threading

Dimensions and material: 5.31 × 1.18 in; BPA-free food-grade ABS casing