This hand pump was designed with professionals in mind and is intended for use with differential fluids, gear oils, transmission fluids, and more! This bottle pump mounts to quart bottles with a 28mm neck and features two pickup tubes for both standard and taller bottles which allows you to use on a variety of application types. The flexible delivery tube allows users to deliver hard to reach fill ports with ease. Note: Bottles will vary, down tubes may need to be cut to fit. Some bottles with handles will cause pump to not fully thread on bottle but will still operate as desired.