Chocolate perfection – Precise, durable, and easy to clean. Dishwasher safe Laboratory glass Non-mercuric column Protective case 12" (30.5 cm) glass column 40 to 130°F Housing Material: Laboratory glass Dimensions: 0.25 W x 12 H x 0.25 D in (0.6 W x 30.5 H x 0.6 D cm)