These are teaching models of a single stranded piece of DNA or RNA in stick representation (PDB: 1ehz). This model is designed to go with a teaching module comparing DNA and RNA basic structures and functions. The printable model is already uploaded to Shapeways.com in the MacroMolecules shop under the name “ssDNA” and “ssRNA”. The models have been printed successfully using these parameters on Shapeways’ laser sintering printer in the Elasto Plastic material.