Black, stiff, .050" / 80-grit silicon carbide abrasive bristles. Recommended for commercial scrubbing on concrete, terrazzo and tile floors.Outlasts more than 100 black or brown pads without clogging. Use wet. 1-3/4" bristles. The brush block is molded with shower feed holes and 5" centerhole for Liberty clutch plates (order separately). 10"- 21" block size. Rotary brushes are sized and named…
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