Specification: Water Flow: 0.6L/min. Type: Outdoor Water Filter. Size: 40*136mm. Material: ABS, UF (Medical Grade), Silicone. Application: Running Fresh Water Source. Satisfy water needs for group and family outdoor activities. The Miniwell gravity water filter system is not a single-user straw. It is a solution for group filtration needs when on the go. Set up a gravity-based water filtering system easily with a palm-sized water filter and a 3-liter reservoir. The gravity system includes a tree strap for effortless hanging. It is a solution when you cannot find an appropriate height branch. Suitable for soldiers, hiking, camping, canoeing, fishing, hunting, climbing, travel, rowing, scouting, outdoor work, survival, emergency, and rescue in earthquake or flood areas. It is also a source of drinking water for people who live in conflict areas, riot areas, and remote villages. Features: 2000L of drinkable water on the go: Filter up to 2000 liters of natural renewable fresh water without using chemicals. Lifespan can be extended by clean water backwashing: Back flush can rinse away impurities that the membrane has filtered from water. A silicone gasket is set around the mouthpiece. A handy bottle can be covered on the gasket for backflushing without leakage. You do not need to keep a syringe on the go anymore. Includes: Portable Water Filter. Dirty Water Reservoir (3000ml). Clean Water Collapsible Bottle (1000ml). Silicone Hose and Hose Clip. Tree Strap (1meter).