Jumbo Aluminium Circle 2mm thick, 38mm diameter.  Choose you finish.1 suppliedAluminium grade 1050. You can also choose too have a 2.3mm hole added.   Finished blanks are supplied tumbled to soften off any sharp edges and are ready to stamp. Unfinished blanks (supplied with a protective peel off coating) will require polishing / tumbling and may have sharp edges.