Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information;2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Convenient to carry and durable in use.4.It is a high-grade and innovative flying tool for kites.5.Special D shape design can make the kite more easy control and fly.6.Reasonable structure, strong and durable, do not easy to break.Specifications:Material:PlasticColor:RedSize:8.8x6.5CM/3.46x2.56 Inch( L x W)Line Length:30MeterWeight:181gPackage include:20 x Kite Line String Winder Boards