haven't used them yet but they seem to be of good quality. Each brush is 6 3/4 long. Large bristles are 1 3/8" x 5/16" wide and 7/16" long. Bristles on narrow end 7/8" x 1/16", bristles 1/4" long. The bristles are made of steel, brass and plastic. They appear to be well secured in the plastic case. All bristles (including plastic bristles) are fairly hard. The box says "Made in China". Numbers x002t3e1/t, pit_31z_u. They should be suitable for fine work with electronic boards etc. I am happy.
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