None #4 5-1/2 in. x 18 in. Cedar Undercourse Shingle Siding
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Certigrade #4 Undercourse Shingles are a utility grade shingle that can be used for creating interior decor that has rustic appeal with the warmth of real wood. With unlimited defects, flat grain and sapwood, these shingles are not intended to be used as siding. Wood undercourse can also be an economical option for shims or other utility functions.