Features: 1) Length of fiber: 10.5 2) Length of pen: 5.12 3) Have novel design with fantastic light effect 4) They can light up when you write 5) Customers\'\' logos can be imprinted on the pen body 6) Color: pink, blue, purple 7) Battery: 3 x AG10 included 8) Good and useful for advertising and promotion Inner packing: 1pc/OPP bag 24pcs/PVC tube/white box Outer packing: 288pcs/ctn