Mini Zinc Printing Plates, 1mm thick, for use with the Tiny Printing Press.
Scratch into the printing plate with an etching needle and then rub oil-based printing ink into the lines. Clean the ink away from the unscratched surfaces and then pull your print, using dampened printmaking paper. Many prints can be made before the scratched lines lose their burr, and both sides of the plate can be used.
 
Pack of 5, square.