Comparison : Item # A2440-2, Replacement Roto Brush (Without Holder), Nylon Bristles
Item # A2440-3, Replacement Roto Brush (Without Holder), Stainless Steel Bristles
Item # A2307-4, Replacement Roto Brush With Standard Holder, Nylon Bristles
Item # A2307-6, Replacement Roto Brush With Standard Holder, Stainless Steel Bristles
Item # A2256-NW1, (Formerly A2256-6X01), Roto Brush With Adjustable Shank, Nylon Bristles, 1/8" Female NPT Inlet, 1/2"-20 Remote Mounting Thread