Standard Pack = 1 piece(s). Diameter = 12 IN; Grade = Medium; Type = Flap Brush; Size = 12 x 2 x 5; Width = 2 IN; Arbor Hole = 5 IN; Diameter = 12 IN; Grade = Medium; Type = Flap Brush; Size = 12 x 2 x 5; Width = 2 IN; Arbor Hole = 5 IN;