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Thickness is also an important factor when choosing security doors. Usually, the thickness of a single-layer security door is about 2cm, which is a relatively basic thickness, and there are three kinds of thickening: 7cm, 5cm and 3cm.
Usually there are more users who use 3cm and 5cm. The 7cm ultra-thick security door is generally only used in large luxury houses, and the price is relatively expensive. If you find a door with a thickness of 1cm, it is recommended not to buy it. It no longer belongs to the category of security doors.