Features:Permanently Waterproof: Formulated with permanent inks that are fade-proof, smudge-proof and water-resistant for long-lasting results.Fine Tip: The markers feature a fine tip for precise control and detail for intricate designs and clear writing.QUICK DRYING: Dries quickly after application, minimizing the possibilities of smearing or smearing and enabling an efficient workflow in art work.Smoothly writing: The marker pen uses a special fiber tip, writing smoothly, with strong coverage, rich colors and non-fading.Wide application: can be written on any surfaces, metal, glass, wood, stone, plastic, paper, etc., has a wide range of uses.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurement Description:Size: Length: 14.3 cm; Diameter: 1.5cmPen tip diameter: about 2.8MMInstructions for use:1: Before use, shake the pen body up and down several times to mix the ink in the pen tube evenly.2: Open the pen cap, hold the pen upright with the nib upward, press the nib with your hand for about 3-4 seconds and let go to release the airsin the pen tube (the new pen is in a completely sealed state, and there is a lot of airs in the tube, so the pressure Excessive use will cause a large amount of ink to spray out during use)3: Press the pen tip down several times until the ink oozes out and then use it. Note that the pressed ink must be used up (the ink fades) before pressing again to prevent too much ink from seeping out.4: Please close the pen cap tightly after writing, and repeat the first method when using it again.5: When the pen is finished writing, cover the pen cap and place the pen head down vertically so that the color will not change nexts time (the paint will precipitate)