I'bbz Frixion Double Brush
The I'bbz Frixion Double Brush offers two brushes in one package. The black boar's hair bristles are stiffer, but not so stiff that they will damage the rock, and the white horse hair bristles are softer, offering less abrasive brushing for softer rock types. Length 250 mm, width 20 mm. 7 mm hole to add a string.