The blue imprint signifies these are the Superior Quality Cocker-Weber® wheel brushes which have hard Chungking (animal hair) bristles that are securely mounted in hardwood hubs. Made in USA.
Chungking bristles are known as the best hair for polishing.
Brushes with 2 or more rows of bristles are converging type.
All have 1/4" arbor hole. Recommended for use on tapered spindles.
Brushes designated "SC" have short cut bristles which give a more aggressive brushing action.