ABS casing, designed for roller shutter belts with a width of 14mm. Surface-mounted belt winder: Simple and convenient operation, it attaches to the entrance of the end belt, allowing the shutter to be pulled with minimal effort. Belt guide with brush: Reduces friction between the belt and the aluminum alloy guide rail, prevents belt fraying, cleans dust, deters pests, and extends the belt's lifespan. Includes 5m of belt, 5m of mini belt (14mm) in grey, pre-wound and tensioned, with a hinge system. Size: Roller shutter belt winder: 172.5*125*23 mm, Belt 14 mm * 5 m. Included: 1* Belt winder with 5m belt roller for roller shutter belts with a belt width of 14mm. The belt winder is suitable for surface mounting and boasts a long service life. After screwing it in, the slat roller can be rotated 180 degrees. Simply attach the roller shutter to be screwed onto the window frame or wall (surface mounting). Installation Instructions: 1. Close the roller shutter completely. 2. Remove the old case from the belt winder and take out the old strap. 3. Mount the new belt winder on the wall or window frame. 4. Pull the strap from the belt winder. 5. Open the belt winder and attach the roller shutter belt to the spring drum. 6. Gently release the spring drum lock and allow the shutter belt to wind up slowly. 7. Close the belt roller. Dimensions: 23 mm x 172.5 mm x 125 mm, Webbing 14 mm*5 m