Thank you very much for viewing. This product is a set of 5. Pen tip approximately 1mm. Immediate purchase is welcome. No price reduction. 【High Quality Specifications】The white letter pen uses high-quality water-based acrylic ink. It excels in quick-drying, water resistance, fade resistance, and abrasion resistance, allowing drawings and lettering to remain firmly on most surfaces such as cloth, glass, stone, metal, wood, paper, tires, and plastic for a long time. 【Water-Resistant Ink】It dries quickly, within 3 seconds after application, and simultaneously forms a strong and elastic impermeable film, demonstrating excellent water resistance, which is also a key feature of this tire marker. The color lasts, does not become brittle, and does not discolor. (※Please note that the drying time may be longer when writing on non-absorbent materials such as glass, plastic, and rubber.) 【Safe and Odorless】Using water-based acrylic paint, it combines the color development of oil-based paints with the harmlessness and odorless qualities of water-based paints. Even if it accidentally gets on the skin, it can be easily wiped off with warm soapy water and will not harm the skin. It is a white magic pen that can be used safely by both children and adults. Thank you for your consideration.