Close-up of the NTR Harmony Copper Brush, a circular wooden brush with dense black and brown bristles and a blue strap with metal buttons.

Close-up of the NTR Harmony Copper Brush, a circular wooden brush with dense black and brown bristles and a blue strap with metal buttons.

Close-up of the NTR Harmony Copper Brush, a circular wooden brush with dense black and brown bristles and a blue strap with metal buttons.