From ultra-fine lines to wide broad strokes, the Sakura BB Pigma brush pen does it all. With a flexible brush nib the Sigma brush pen responds to changes in pressure quickly, delivering a variety of stroke widths with smooth transition. With Sakura\'s pigment based Pigma ink, these brush pens deliver rich blacks that, once dried, are fade and waterproof. - Brand: Sakura - Pigma BB brush pen - Size: Bold - Archival, waterproof pigment-based ink - Flexible brush tip