The file 'Schwartz P Surface Cube 3D Printer Model' is (stl) file type, size is 5.3MB.
Schwartz P Surface model with 27 unit cubes. Approximate dimensions are 65mm cubed, with a 1.4 mm wall. Learn more here:http://facstaff.susqu.edu/brakke/evolver/examples/periodic/periodic.html#psurface