These are new fuel rated valve cores and will fit the 214, 275, 275A, 285, 286, 288, 288A, 290, 290A lanterns and also the 400, 400A and 508 stoves.
These will function for Off/On in the following stoves, but may not allow full flame control, particularly at the low end of flame adjustment: 400B, 440, 442, 3024, 508A and 533.