Universal Application These replacement parts are good for roller shutters with a diameter of 25mm. The standard size of these roller curtain accessories is suitable for all standard roller blinds, which can be used in offices, homes, hotels, etc. Superior QualityCompared with other accessories Made of pure plastic, each of our accessories is made of metal core and plastic shell, more sturdy and durable. Pure metal bead chain with exquisite workmanship without burr makes controlling blinds smoother. Easy Installation Drill the required mounting holes on the ceiling or on the wall first, then install the brackets for top, side or front mounting, which can be placed on the right or left. Economical and Convenient This white universal roller shutter accessory is elegant and simple , and can be compatible with almost all styles of blinds. It is a good helper for you to replace broken or worn out accessories and save your money. Package Includes2 sets in total, each set comes with 1pcs bead chain. 2m, 2 brackets, 1 controller, 1 transparent safety clip, 4 white plastic expansion tubes and 4 metal Phillips screws. These accessories are enough to help you complete the assembly.