Block holds twelve 10ml (12 x 15/16mm) test tubes for Benchmark Digital Dry Bath (BSH1001, BSH1002, BSH1004). Block cavities are precision machined to match the conical shape of the tube size, providing unsurpassed temperature uniformity. Block size: 3 x 3.75 x 2 inches (7.6 x 9.5 x 5cm). Capacity: 12 test tubes. Tube size: 10ml. Material: high grade aluminum. Sold individually. Benchmark Scientific #: BSW1516.