Opening reel: This component is very suitable for replacing damaged watch cases or belt winders. Removable cover for quick ribbon replacement, the ribbon is automatically wound. Material: The belt guide is made from high quality materials, cleverly designed and easy to install. Design: The color of this piece is white and the bracelet is white. Perfect for repairing damaged strap winders. Product size: 17x12x2.3cm. The length of the ribbon is 5m and the width is 1.4cm. Suitable for standard size roller blinds. Convenient to use: The spiral winder installed on the surface of the winder is easy to operate. You can connect it to the belt inlet of the winder, then you can easily pull the winder. It can retract automatically when changing the bell. Note: The data are all measured manually, please allow 1-3cm error due to the difference in light and display, there may be have color differences, please refer to the actual item received.