This is an fully parametric and customizable open source syringe pump. The design, bill of materials, assembly and operation instructions are available here.

This is part of a library of designs detailed in: Bas Wijnen, Emily J. Hunt, Gerald C. Anzalone, Joshua M. Pearce, Open-source Syringe Pump Library, PLoS ONE 9(9): e107216. doi:10.1371/journal.pone.0107216