Usage Tips:[Affordable Filter Replacement]Our water filter replacement filter is perfect for easily replacing brand BB9-2 black purification elements and PF-2 fluoride filters in gravity water filtration systems. Compatible with Travel, Big, Royal, Empire, Crown Series, Propur Traveler, Nomad, King, Big Series, Gravity filter systems. [Don't worry about water quality]The water filter replacement effect is better than other water filters on the market. The filtered water is purified very clear and has a neutral taste with practically no odor. Effectively reduces chlorine, fluoride, heavy metals, taste and odor, sediment, large particles and other pollutants by up to 99%. [FOOD GRADE MATERIALS]Our products are strictly inspected, The BB9-2 black filter is made of material, and the PF-2 white filter is made of natural coconut activated carbon to remove fluoride. Pass water over granulated activated charcoal for superior taste improving properties. [Economic and Practical]According to the size and budget of each family, we recommend that you replace the PF-2 fluoride water filter every 1,000 gallons and the black water filter every 6000 gallons under normal conditions. It uses more of the safest water and costs less. [CHANGE YOUR LIFE]Especially in summer, you can safely drink tap water, even untreated raw water from remote lakes and streams, make coffee and cook. Great for home, travel, outdoor activities, and emergencies such as water shortages, the Big for BERKEY water filter system replacement can provide you with healthy, clean, high-quality water. Colour:black Material:plastic Size:about 21 x 5.6 x 3cm Package Contents: 2 X filter elements Only the above package content, other products are not included. Note: Light reflection 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.