Perfect MatchThe filters are Compatible with PETLIBRO 71oz/2.1L Pet Water Fountain PLWF002.These are Samanija branded filters and are not created or sold from Petlibro Dimension The filter Length is about 7 inch(17.8cm) , The Width is about 3.6 inch(9.2cm), The Thickness is about 0.4 inch(1cm). the Sponge size is 1*0.5inch Package10-pack of premium pet fountain replacement filters with pre-filter sponge, individually packaged and sealed to maintain high quality. MaterialEach filter is composed of activated carbon, ion exchange resin and non-woven fabric. They can filter hair, heavy metals, and improve the taste of the water so that pets can drink clean and fresh water all day RecommendationsTo prevent the activated carbon dust (which will not harm your pets) from shedding into water, please soak the filter in water for 5 minutes and rinse it thoroughly under running water before use. According to your pet's drinking frequency and number of pets using the fountain, change the filter every 2-4 weeks.