Stradivarius 1797 Raphael nº4 round travel brush The Stradivarius travel brush has slightly wavy imitation Kolinsky fibers, which gives it excellent liquid retention capacity. The use of a mixture of fibers of different diameters adapted to each brush size provides nervousness and elasticity to the strand, therefore very good shape memory of the brush. It is flexible and suitable for all fluid media. It is ideal for working with watercolor or ink. The 1797 series has a reversible handle. Diameter: 4 mm. Hair exit: 19 mm. Brand: Raphael.