Features 1、Durable And Practical: This jail writing pen is made of excellent PP, TPE and nylon material, which is sturdy and durable, not easy to be damaged, and has a long service life. 2、Ergonomic Design:This jail conversation pen is ergonomically designed for a comfortable grip and easy to use, and can be used in a variety of situations. 3、Fine Craftsmanship: This anti swallowing writing pen is made with fine craftsmanship and good detailing which can ensure that they are pop and durable. 4、Safe And Reliable: This anti swallowing pen has rounded edges and is very safe and reliable to prevent prisoners from self destructing and self destroying. 5、Wide Application: This jail signature pen has a wide range of applications and is very practical for daily writing in prisons, hospitals and psychiatric hospitals. Specification Item Type: Anti Swallowing Pen Material: PP, TPE, Nylon, Tungsten Bead Tip Size: 0.5mm Usage: Approx. Writing Length 300m / 984.25ft, Writing Quantity 5000 words Application: Interview Room Package List 1 x Anti Swallowing Pen 1 x Pen Refill Key