Utilizes a smooth stainless steel adjustable guide plate to allow the brush to easily glide over the carpet. This protects the integrity of the carpet, reduces drag, and increases efficiency. Reduces operator fatigue. No break-in process required. Designed to fit 17" or 20" floor machines. Adjustment screws raise glide plate as bristles wear. Includes NP-9200 clutch plate. Filament color: Black. Filament Dia.: .014.