These connectors are useful for creating temperature enclosures around a 3D printer, or for other quick build uses where foam core board is used.Print the pre-built STL files, or edit the SCAD file (provided) to fit to your own table top measurements.Print settings:PLA or ABS0.20mm - 0.4mm layer height15% infill2 shellsSlide the foam core board into the connectors for a quick and easy way to join the materials.The pre-built STL files are pre-set for 4.8mm dollar tree foam board and 7/16" plywood table top thicknesses.