light simple inner window frame rail set

[Features]
Just by attaching it to the inside of an existing window, you can save energy, greatly improve the cooling and heating effect, and reduce condensation.

[Use]
Install inside your existing window to make the window double glazed.

【specification】
Color: wood grain
Applicable size: For sliding windows with window dimensions of width 1830 x height 915 mm
Packing size (mm) height x width: 1860 x 57

[Specification 2]
Window insulation performance 2.44 times (from heat transmission resistance), JIS insulation grade H-4 grade, optical polycarbonate hollow board 4 mm thick (hollow polycarbonate board sold separately, depending on size, processing such as cutting is required.)

[Material/Finish]
vinyl chloride

[Set contents/accessories]
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【Note】
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