Feature: 1. Provide convenient, safe and clean outdoor drinking water. 2. Super Water Purification Ability: Under normal circumstances, at least 1000 liters of water can be filtered. 3. Remove at least 99.9999 percent of aquatic 4. Remove at least 99.9 percent of aquatic parasitic protozoa. 5. Reduce the Turbidity: Can filter out about 0.2 microns of particles. 6. No chemicals. Specification: Material: ABS and PE Filter Material: Ultrafiltration Membrane, Activated Carbon, Nano Silver Particles Size: 21.5cm x 3.3cm/8.46" x 1.30" Color: Green Package include: 1Pcs Water Purifier 1Pcs whistle 1Pcs compass 1Pcs Mirror 1Pcs Carabiner 1Pcs Straw Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 2. Please allow 1-3mm measuring deviation due to manual measurement.