12Pk Oral-B Compatible Toothbrush Heads-Floss Action

Are these compatible with the Oral-B 2000 model? I am currently using the Oral-B Precision Clean replacement brush heads

Bought a few of these to stockpile in the past. Had no trouble with them until the past month, where four of them have suddenly failed (something inside the stem audibly snaps and the thing stops vibrating).

The first time I thought I might have been using it too vigorously. Four of them? Manufacturing defect.