Hollow shutter glass is a product which installs aluminum blinds into tempered insulated glass. The user can control the remote to adjust the blind slats to make glass be full shade, semi-transmit light. The product will take its energy-saving and shading effect into full play when combining with aluminum or plastic steel doors and windows system.
https://www.fmblinds.com/Remote-Control-Aluminium-Alloy-Miniblind-Glass-with-Battery.html
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