Econ-O-Cube mold casts 3 compression test cubes at one time in a diagonal arrangement. Mold and detachable base are held together by self-aligning thumb screws which ensure an even, tight fit. Mold and base are molded from an engineered plastic which resists cement, mortar and mild acids. Econ-O-Cube provides accurate samples every time. Reusable, easy to clean, forms 3 test cubes and lightweight. Molded to ASTM C109 dimensional tolerances but does NOT meet ASTM standards. Separates into 3 pieces for ease of cleaning