Vintage Ink Pen Brushes and Splatter Brush Pack - Free Photoshop Brushes at Brusheezy!
Brush Pen marks - Free Photoshop Brushes at Brusheezy!
Amazon.com : Kuretake Fountain Brush Pen black body with 3 Spare Cartridge, Black ink (No.13), Flexible Brush Tip for lettering, calligraphy, illustration, art, writing, sketching, made in japan : Calligraphy Pens : Office Products
Photoshop Mini Tip: Using Pen Tilt with Ink Brushes - YouTube