[Refillable & Customizable] Each pen features a large capacity reservoir that can be filled with water for blending or your favorite ink for personalized colors. the innovative design lets you control ink by simply squeezing the . portable painting studio anywhere with these versatile tools. [Nylon Brushes] Featuring premium nylon hair tips that maintain their shape without fraying or spraying. these durable brushes deliver smooth consistent ink without smudging or bleeding. the flexible yet firm allow for precise control whether you're blending colors or creating fine details. [Easy to Use & Clean] Designed for convenience these brushes clean effortlessly with just water after use. the transparent white lets you monitor ink levels while the ergonomic design ensures comfortable use during long art sessions. perfect for both indoor studio work and outdoor plein air painting. [Professional Grade Tools] These watercolor brush pens meet the demands of serious artists with their high performance design. the durable plastic barrels and leak proof construction make them reliable for daily use. whether you're a beginner learning techniques or a professional creating masterpieces this set delivers exceptional results. [Versatile 6 Tip Design] This watercolor brush pen set includes 6 different pen tips to accommodate various artistic styles from detailed line work to broad strokes. perfect for sketching coloring painting illustration and calligraphy. the multiple tip sizes make it ideal for artists of all levels from students to professionals.