Ink Pen Refills, 20 Pcs Security Marker Pen Magic Marker Ballpoint, Multifunction Ink Gel Pen Refills for School Office Supplies

• 1mm Nib: Excellent performance the ball point pen refill is equipped with a 1mm nib, so you can write or draw thin lines on paper easily and smoothly
• Portable and Durable: 9cm pen refills is very portable and convenient to carry, it made of high quality plastic making them strong and durable
• Hide Secret Message: This magic pen refill allows you to write down your secret message and hide it. Only by turning on the light on the cover of the specific pen can you reveal the secret of the secret message
• Transparent Ink: Transparent quick-drying ink is used, and the handwriting is almost invisible under natural light, and can only be clearly seen under specific light sources such as ultraviolet lamps or banknote checking lamps. It is not easy to erase on paper, but can be easily removed by washing with water if written on skin and fabric
• Application: Applicable occasions the ball point pen core is suitable for any occasion requiring writing, including office, store, business, school, classroom, library, home, etc

Feature: 【Smooth Writing】High performance ink ensures smooth writing and is not easy to break or clog, this ink not only meets your high expectations for smooth writing, but also brings unprecedented writing pleasure, making every stroke of the pen an enjoyable experience. However, it is generally not suitable for smooth or special material plane, such as wood, glass, plastic, etc.. 【Long Lasting and Resistance】The nib is made of high-grade copper, which has good abrasion resistance to ensure that even in long time, high-intensity use, it can still maintain excellent writing quality, which greatly prolongs the service life of the product. The ink formula has been carefully blended, excellent stability, not easy to fade or spread. Transparent ink refills are suitable for most pen sets on the market, the size of the pen set is about 13.7*0.91/5.4*0.36in. 【Multi-scenario Application】The refill has a wide range of application scenarios, not only for school teaching activities, but also for various games and entertainment activities. At the same time, it can also be used as a tool for marking on a variety of objects, and even become a fun way to communicate secretly with your buddies. Specification: Name: Transparent Ink Pen Material: Plastic Fuel Line Length: 82.5mm/3.25in Total Length: 90mm/3.54in Nib Size: 1mm/0.04in Note: 1. Remove the protective cap from the nib before writing. 2. Do not write too deeply or you will leave a mark on the paper. 3. Extreme temperatures or humidity may affect the effectiveness of the ink. 4. Non-toxic, non-edible ink. 5. If the refill has not been used for a long time, resulting in writing is not smooth, you can try to refill the refill downward gently shake a few times, or in the paper a number of times, has been restored to its smooth writing state. Package Included: 20 * Transparent Ink Pens