I received this answer from GE:
Thank you for contacting GE Lighting. I am happy to assist you.
Type B refers to the shape of the bulb. This is the most common
decorative shape. The "B" stands for "blunt tip". To view an example of
this shape, please go to the following link and click on "chandelier" (not
sure whether you need a small base or medium base, so just choose
accordingly) in the "decorative" section. You will see "bent tip" and
"blunt tip" categories. You want to look at the blunt tip bulbs.