Factory cut replacement foam for your Model F / Beamspring vintage keyboard.6 variations:F XTF I have not tested the Displaywriter foam as I do not have that keyboard** The 3277 is not supported as the layout seems to be a bit different from the others; some modification would be needed** The 3276/3278/3279/3101 is made to support numpad and numpadless versions; this means you may need to trim down the foam on the numpad side (very easy just need a pair of scissors or knife)Please note your foam may have some folds in it from shipping.
* Note on the Model F foams: It's easy to miss but there are slits in the foam for the barrel plate tabs to go through (so no need to trim those parts); confirmed works on every keyboard I've tested on.