4816 Cimex NyloGrit Strip Brushes (set of 3) for 19" (19 inch) Cimex Machines Floor Care. For stripping hard floors. These brushes are nice because the brush bristles travel down into the dips and contours of the floor to insure that all the floor finish is removed. This brush is for aggressive scrubbing of concrete and stripping of resilient floors like terrazzo, and tile. The nylon bristles are impregnated with 80 grit silicone carbide to give that extra scrubbing bite to any dirty job.