These are replacement filters for our zerowater pitcher we use in our rv. We love our zerowater. It works very well when traveling and we are unsure of the water at our stops.
Great filters, but a bit difficult to install; the rubber doesn't fit inside the plastic screw-on opening seal no matter how hard I turn it, and with almost every filter and the last few orders I've had of these filters there has been this black rubber-like stuff on the outside.
Easy ordering and reasonable price. I wish they lasted a little longer than 2 weeks, but they do work well. Even though I have soft water, my Keurig coffee pot will not work without filtered water.