Description: Item type: UV Light Pen Shell material: plastic Ink properties: invisible ink Specification: 13.3cm Net weight: 11g Package Include: 7 * UV Light Pen(Red, blue, black, green, yellow, purple, pink) Note: The colors deviation might differ due to different monitor settings. We provide you with the best product and service, if you have any problem, please let us know, and we will solve the problem ASAP. Thank you so much.