As mentioned, I have included two versions of the air pump in Two Air Pumps, short and tall. Select either the combination of "Plunger.stl and Tube.stl", or "Plunger Tall.stl and Tube Tall.stl" that best fits your printer. I printed all parts on an Ultimaker 2+ Extended and an Ultimaker 3 Extended at .1mm vertical resolution for the tall version, .2mm vertical resolution for the short version, 50% infill for both, and no supports. At both .1mm and .2mm vertical resolution, both air pumps assembled and operated fine so printing at .2mm will reduce printing time. Prior to assembly, test fit and trim, file, sand, etc. all parts as necessary for smooth movement of moving surfaces, and tight fit for non moving surfaces. Depending on the colors you chose and your printer settings, more or less trimming, filing and/or sanding may be required. Carefully file all edges that contacted the build plate to make absolutely sure that all build plate "ooze" is removed and that all edges are smooth. I used a flat jewelers file and plenty of patience to perform this step. To minimize filing, printing with the slicer "brim" or "raft" feature is a good option. Use "Gasket Template.stl" to cut the air intake gaskets from the gasket material of your choosing. I used both a single bevel razor blade and a modeling knife to cut the gaskets. Make sure the cut is clean before attempting to remove the waste material. Note that one gasket has a center hole, and the other does not. The center hole gasket is for the plunger end of the air pump, and the remaining gasket is for the remaining end. After printing and preparing all the parts, and cutting the air intake gaskets, assemble the air pump as shown in the video. Hope you like it!