Non Sulphurated Clay Holds Excellent Detail Easily Tooled Perfect For Amateur And Professional Sculptors Alike Slab Weight Varies (See Product Description) J-Mac Classic Clay is a sulfur-free professional grade modeling clay adored by clay sculptors the world over for its easy workability and excellent carving and shaping properties. Requiring minimal armature support, J-Mac Classic Clay is ideal for clay sculptors who don’t want to fuss with the preparation period of a sculpt. Additionally, J-Mac Classic clay is compatible with virtually every mold making rubber, ensuring that each sculpt can be easily and safely molded by those who intend to cast their work. J-Mac Classic Clay will not sag, crack, crumble or dry out at room temperature. Slabs and cases of J-Mac Classic Clay are not produced by J-Mac in uniform weight. Slabs are typically 9-10lbs (12" x 9"); price in cart assumes a 10lb slab.