Features: Magic LED UV Light Ballpoint Pen: This innovative ballpoint pen features a built-in UV light that reveals invisible ink, adding a fun element to your writing experience. Invisible Ink UV Light Ballpoint Pen: Write secret messages or create hidden designs with this pen's invisible ink, which can only be revealed using the integrated UV light. Invisible Ink Ballpoint Pen with UV Light: This pen combines the functionality of a regular ballpoint pen with the novelty of invisible ink, making it ideal for creative projects or entertainment purposes. Smooth Ink Ergonomic Design Lightweight Pen: Enjoy smooth ink flow and comfortable writing with its lightweight construction and ergonomic design, suitable for extended use. Quickly Drying Portable Ergonomic Handle Pen: Features a quick-drying ink formula to help prevent smudging, ideal for all writers. Its portable size and comfortable grip make it convenient for everyday carry. Specification: Type: Reusable Material: Plastic Shell Total Length: 132mm Notes: 1. Due to lighting effects and shooting angles, there may be slight color variations; please understand. 2. Due to manual measurement, there may be a small size tolerance. Includes: Choice 1-4, 6-11: 1 x Invisible Ink Pen (No retail box) OR Choice 5: 2 x Invisible Ink Pen (No retail box)