Changzhou Bright Energy Saving Technolog

1)This roller shutter slats filled with polyurethane foamare lighter and have more advatages. That are energy-saving, sunshade, sound-proofing, fire-p

1.The winch of roller shutterparts is used for manual roller shutter, connected by adaptor and work with cardan joint.Controlled by handle, turn the h

1.The winch adapter of roller shutterparts is used for manual roller shutter, work with winch.Controlled by handle, turn the handle then the cardan jo