3--5cm: suitable to carry

14.5cm: for most home windows and doors

17--21cm: suitable for hanging in the company or warehouse

Eight hanging mirror hanging method:

Concave mirror: you can hang in the room (now the location of doors and windows) and outdoor

Convex mirror: You can only hang in the outdoor

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type 1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??type 2

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type 3 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?type 4

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