Part No. 1038 Hamilton Beach Single Head Model 18.
One set of two brushes with proper springs.
Don't know if you need brushes? Go to the "How-to's & Diagrams" page on the website under the models 30 and 930 section to help explain a brush problem, as most brush problems are all related on any single head mixer.
NOTE: These will also work on some models 15 and 17 mixers, but before purchasing the brushes for those 2 models, email email@example.com so that he can explain it.