¨ Compact design and invisible screw on surface
¨ The chain is curved unidirectionally, stretched out through window putter while opened and hid while closed.
¨ Be designed with double metal plates for stable and smooth operating
¨ Protection from overload and window closed tightly
¨ Low Noise
¨ Load opening and closing 30000 times
¨ Rotating Bracket
¨ Suitable for various window types
¨ Customized colors and the white for normal
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