It may be for a 301 as the cut out looks fairly long for a standard featherweight. The length of my inset piece for my Featherweight card table is 17.5 inches. If yours is longer, there will be a gap and your machine will not fit in snugly. Other machines will not fit into this table as most machines are screwed in with hinges. These tables have flat little plates or prongs that fit into the underside of the Featherweight or 301 and extra length for the drop down extended bed.