Creative Hobbies Ceramic Mold Rubber Bands, Special Heavy Duty Formulation, 1 Pound Bag - 4 Inch Size Creative Hobbies Ceramic Mold Rubber Bands are a natural, heavy duty formulation Ideal for ceramic and pottery use to hold plaster molds together. Great for woodworking projects to hold parts together for gluing. Approx. 7/8 inch wide x over 1/16 inch thick. Other sizes available. Imported.