D: Basswood, Larch, Pine, Birch, etc. - B: Keruing, White Poplar, Beech, Cedar, etc. - C: Lauan, Ash, Elm, Fir, Maple, Padauk Oak, etc. - A: Teak, Walnut, Afrormosia, Imbuia, Cork, etc. 8 types of wood material are printed on the back of the detector for convenience.
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