Description: brand new and high quality Features: Using this invisible ink pen, only can you see it until shining it over where you wrote. Very interesting and bring fun for kids. Harmless and flavorless ink, You can write everywhere:T-Shirts, paper, skin and any surface. The inks is durable but washable. very safety to use. The magic pens have the UV light installed in the cap so you don'for t need to buy a spare light, which also comes with battery in it, very convenient to use. Specification: Material:Plastic Color:Random Color Pen Length:13cm/5.12''(Approx) Quantity: 6Pcs Warm prompt: 1.As different measuring methods,it will occur 1-3 for cm deviation about the items,please ensure that it is okay for you before ordering. 2.Because of different monitors and lamplight,the picture may not reflect the actual color of the item,really thank you for your kind understanding! 3.Invisible Ink Pen only,other accessories(if any)irrelevant demo in the picture are not included. Packaging includes:Invisible Ink Pen x 6 (without retail package)