The prison writing pen is equipped with a special supervision code to prevent inmates from swallowing or self-destructing, ensuring safety. The prison writing pen is designed to be concise and practical, easy to clean, and convenient for inmates to use, ensure the prison safety. Features -Color:Random Color -Material:Rubber -Size:14.50X6.00X1.00cm/5.70X2.36X0.39in -Note:The product has color difference - This safety writing pen has a proper size for easy to hold, smooth writing, comfortable usage feelings - Manufactured with good and anti-wear rubber material, flexible and safety for a long time using - The workmanship of this safety pen is perfect, and you will have a good experience in using it - It owns unique and retractable pen tip design, make it more safe and can be used in the prison - Ergonomic design makes it suitable for everyday writing use in the prison, hospital and mental hospital Package list: 5 x Prison Writing Pen