This is a set of a 500ml IV pressure bag and a hand scale. I used it for about 4 months for a cat with kidney failure, but I no longer need it, so I'm selling it. I felt that the pressure bag halved the IV drip time, but some cats get startled by the strong flow and move around. It shows signs of use, but there are no functional problems. The pressure bag is easy to operate with one hand. The hand scale is a Shinwa 1kg model. I will ship it as quickly as possible via Takkyubin Compact (time-slot designation available).