Ergonomic design Numbered slots Optimized capacity (24 places for 0.5 to 2.0mL vessels, 16 places for 5.0mL vessels) UV-resistant Autoclavable (121 °C, 20 min) Variable: rack for Eppendorf 5.0 mL vessels, can also be used for 15 mL conical screw cap tubes Robust coupling mechanism for 0.5 mL to 2.0mL racks Stackable