An Aluminum Single Block filled with Lab Armor Beads. Capacity: 0.25L and 0.50L of Beads, Thermal Uniformity: 'At 95°C to +/- 1.0°c w/Lid. LxWxH: 3.25 x 2.5 x 2.5 inches (8.4 x 6.4 x 6.4 cm). Variety of Colors.