Practical Combination Set: you will receive 7 pieces of blank markers in various sizes with different styles of pen tips, sufficient in quantity and complete in combination to meet your diverse painting demands Sturdy and Serviceable: the pen tube of these refill paint markers is made of quality material, and the pen point is made of polyester and acrylic, stable in structure, hard to break or deform, comfortable and reliable to use for a long period Easy to Use: these refillable paint pens are simple to fill with color, just take off the tip area of the pen, then fill it with paint or ink, finally twist the tip back to begin writing, convenient to use without complicated steps, saving your time and energy Transparent Design: the pen tube of the empty refillable marker adopts a transparent design, convenient for you to control the amount of ink, so that you can fill the ink in time; And there is a steel ball inside the pen, to work as mixing ink for smoother writing Versatile Performances: the refillable paint pens for walls have a wide range of applications, allowing you to fill with different colors you like, and can be applied with most types of ink materials, such as art acrylics, oils, watercolors, stains, inks, dyes and more