These mantels include panels that fit VFHD-36, VFFD-36, AND DF42 without cutting. But these mantels are also considered UNIVERSAL MANTELS and have sliding panels that allow the mantel opening to adjust from 37 3/4 to 45 inches wide and from 32 1/8 to 39 1/4 inches tall by cutting the sliding panels for each side to the proper firebox height

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