A very basic model--the bushing that separates the damper rail from the action rail in a Rhodes piano. These should be printed in a high strength material that has self-lubricating properties such as PA or POM. It is possible to use PETG but they are unlikely to last nearly as long. PLA is unlikely to produce even a minimally long-lasting part, though it would probably get you through an emergency if necessary.
The author marked this model as their own original creation.