>>>EDIT<<< UPDATE: I forgot the bottom part. It's not uploaded. >>>EDIT<<< UPDATE: FIXED. Uploaded the bottom. This is a 3D printable syringe pump extruder for modifying a 3D printer to work with fluids, gels, or other "softer" materials. See this article for an example of a published method involving this extruder: http://advances.sciencemag.org/content/1/9/e1500758 The assembly process is the same as for the Replistruder V2 - please see this youtube account for access to those videos: https://www.youtube.com/channel/UCEwYrE9pROR0kinbDDSCFWg Instructions on using this: 1. Print it, get the parts mentioned in the youtube videos - screws, syringe, etc. 2. Assemble it. 3. Mount it in place of the plastic extruder on your 3D printer of choice (see the youtube account) 4. Modify settings (see youtube account) 5. PRINT GELS!