Invisible Ink Pen and UV Light Secret Message Wedding Party Features: 100% positive seller and Good feedback Write with the invisible ink pen then light your message with the mini UV black light to see what was written! Invisible pen brings you an amazing variety of fun applications: Secret messages, Emergency flashlight, Security marking UV light : Verify hidden security features on banknotes and passports,Check watermarks and security strips. Specifications: Size:130mm(Length) Net weight:13g Package weight:23g Color:Pink, Green, Purple, Blue Packing content: 1 x Invisible pen with UV light notes and passports,Check watermarks and security strips. Specifications: Size:130mm(Length) Net weight:13g Package weight:23g Color:Pink, Green, Purple, Blue Packing content: 1 x Invisible pen with UV light