Features:Reverse Osmosis (ro) Membrane, material made via excessive quality. Used for consuming water purification, lower bacteria, heavy metal, improve taste, odor. Apply to most family natural water machine and water purifier. Smooth cover, lengthy lifestyles use, practical:Name: Reverse Osmosis (ro) Membrane Usel: Water Filtration Length: Approx 30 cm Diameter: Approx 5cm Working Temperature: 5-50℃ Working Pressure: zero Mpa Type/Weight: 50GPD/194g, 75GPD/200g, 100GPD/216g,125GPD/250gNOTE: For varied monitors, the color might fluctuate slightly. Besides, please allow some mistakes of manual measurement, thanks in your understanding!