Zhenda Durable Steel Wire Road Sweeper Brush
1.The thickness of flat brush blade is 16-17mm; 2.Thickness of
concave-convex brush:
205mm inner diameter 45mm thick 255mm inner diameter 48mm thick It
thickens with the increase of inner diameter 3. Number of brushes
required for each set = brush roller length / brush thickness
4.Outer package: A box usually holds 21 or 23 pieces