Specification: Water Flow: 0.6L/min.  Type: Outdoor Water Filter.  Size: 40*136mm.  Material: ABS , UF(medical grade), Slicone.  Application: Running Fresh Water Source.     Description: Satisfy water need for group and family outdoor activities.  Miniwell gravity water filter system is not a single user suck up straw. It is a perfect solution for a group people filtration needs when they are on the go.  Set up gravity-based water filtering system easily with palm size water filter and 3 Liters reservoir.  Gravity system includes tress strap for effortless hanging from tree. It is a good solution when you can't find appropriate height branch.  Good choice for soldiers, hiking,camping, canoeing, fishing, hunting, climbing, travel,rowing, scouting, out-door work, survival,emergency and refugee and rescuer in earthquake or flood area etc.  And it is also an affordable source of drinking water for people who live in the conflict area, riot area, remote village and tribe.     Features: 2000L drinkable water with you on the go: Filter up to 2000 liters of natural renewable fresh water without using any chemicals.  Lifespan can be extended by clean water backwashing: Back flush can rinse away impurities that membrane has filtered from water. We set a silicone gasket around mouthpiece. A handy bottle can be covered on gasket for backflushing without leakage. You don't 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)