This tynex scrub brush is an aggressive nylon brass mix brush for general scrubbing or stripping finishes from cement only. All Tynex Brushes must be run in a wet environment. Bristles are attached to a plastic block, and 1.5 inches in length. It will fit our IPC Eagle 20" automatic floor scrubbers. Take a look at our complete line of walk behind scrubber brushes for other options.