The Filling Tube is a blunt-tipped needle specially designed and cut to the appropriate length for each ALZET pump size. It has a hub for attaching to a syringe for filling the pump with the desired test solution. Each box of 10 pumps comes with one filling tube. Additional filling tubes may be purchased as needed, and they are available in multiples of 10. Note that ALZET pumps should only be filled with these specially designed filling tubes.
