Case Comes With 5 (10lb) Slabs Of J-Mac Clay -- Total Weight: Varies (See Product Description) Non Sulphurated Holds Excellent Detail Easily Tooled Perfect For Professional And Amateur Sculptors Alike 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 7-10lbs (12" x 9"); cases are typically 45-50lbs. Prices in the shopping cart assume a 50lb case.