NSP Medium Brown, 1/2 Case

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These clays offer the same working characteristics as the sulfur based clays but won't cause surface inhibition when using some of those sensitive mold making rubbers. All come in two pound bricks. In general, these clays tend to be slightly harder than their sulfur based counterpart. 1/2 case contains (10) 2 lb. bricks. Sulfur-free

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