Burner Knob / Valve Stem Standard 'D' Stem Extender - the larger side inserts over the valve stem, the smaller end inserts into the burner knob standard 'D'. This extender can be cut to the specific length you need. Only one available at this time.

There are times vintage stove owners are unable to find exact replacement knobs for their stoves - stem extenders sometimes add just enough 'reach' to make a non-original knob work. Please compare measurements and the knob you are using to be certain it will work on your stove.