Provide pure water for your drinking everyday. Protect your home, health, and appliances by filtering your water. Inner and outer diameter of membrane wire: 400 +/- 10/600 +/- 10μm Purified water flow: 3500ml/min Operating temperature: 4-45 Celsius Working pressure: 0.08-0.3Mpa Filter precision: 0.01μm Bursting strength: more than 0.8Mpa Recommended replacement period: 12-18 months Interface: 20 inch flat mouth universal Colour: picture color Material: Hollow fiber Size: 508x70mm Package Contents: 2 x filter elements Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.