Standard Pack = 1 piece(s). Arbor Diameter = 1/4 IN Stem ; Brush Length = 7/8 IN ; Diameter = 1 IN ; Material = Polyflex encapsulated Steel Wire ; RPM = 14,000 ; Standard Pack = 10 ; Trim Length = 7/8 IN ; Type = Encapsulated Crimped Wire End Brush ; Wire Size = 0.0104 IN ;