The Durham Geo reusable Steel Cylinder Mold is available in a 6 x 12 in. (15.2 x 30.5 cm), and 4 x 8 in (10 x 20 cm) size for preparing concrete test specimens for compression testing. It comprises the mold with a clamping system to keep it tightly closed and a base plate that is clamped to the cylinder when being used. Single-use plastic cylinder molds are also available. 6 x 12 in models available with or without handle.