Russian Military Compact Pocket Individual water filter NF-10 Ratnik (Individual Water Filtration System) See video review of NF-10 Russian Individual Water Filtration System here: https://youtu.be/92ARVDP61Mg Individual water filter set SF-10. One filter provides 5 liters of water. The set includes three replacement filters, hand pump, all needed hoses and camo carry bag. Pocket size. Case length - 20 cm. Weight - 250 grams. Designed to clean fresh water from any surface sources. Removes toxic substances, radioactive, chemical or biological contamination to obtain drinking water. Must-have for survival in extreme situations. Quality indicators of source water: fresh water from surface water turbidity - 200 mg / dm3 (liter), Salinity - 2 g / dm3.