PB 3315312 42" 8 Double Row Stiff Nylon Main Broom for Power Boss 88 Series Sweepers. Stiff Nylon filament for extra duty sweeping indoors or outdoors. Larger diameter straight filament as compared to the standard 8 double row Nylon main broom. The stiff Nylon brush is durable enough to be used outside on smooth concrete and asphalt for litter collection. 42" Length. Drive hubs are recessed into core by 1-1/4". Fits Power Boss Model 88 Series Sweepers. Will not fit SW/8 Series. The softer standard 8DR Nylon broom is pictrued. Replaces Power Boss 3315312, 315312