They didn't come with the essential plastic pieces, that you need.
They are really nice, but are missing the essential plastic piece that you need to connect the oxygen tube to the humidifier, a piece that you need to have to send the air through the tube to the person. Thankfully I had my old humidifier and used the part from that to use the new Humidifier. It looks complete in the picture, but mine did not have them.
Rating: 3 stars