The original no sulfur J-MAC "Classic" Clay for professional sculptors is available in three degrees of hardness and two different colors. It is easy to work with, requiring the minimum in armature support. It is the worldwide favorite of sculptors. This clay is compatible with many molding rubbers, and will not cause a problem during the mold making process. Each slab is approximately 10lb of clay and costs $4.21/lb. Bulk pricing available with purchase of 5 or more slabs (5 slabs = 1 case, approximately 50lbs), just $3.46/lb.