This is a list of replacement filters for 1.6L pet fountains. These circular filters will fit most of the 1.6L Flower Fountains for pets including YOUTHINK, HOMMI, ISYOUNG, KOALAD, HAPPYPAPA, PEDY, DADYPET, logrotate, automatic flower fountain and other of same size.. Dimensions of these filters are 5” diameter with thickness of 0.31” to 0.4”. Please compare the dimensions of the existing filter in your pet fountain before ordering.