This Thermo Scientific® ELED combination microcentrifuge block holds thirty 0.5mL and nineteen 0.2mL microcentrifuge tubes.. This block is made of anodized aluminum for the greatest heat transfer and retention. For use with the digital 2000 series and analog 2050 series modular block dry baths. Designed to provide close contact of tubes to block walls for excellent heat transfer. Includes thermometer well for monitoring block temperatures, block puller for safe, easy block removal. Dimensions (L x W x H): 3.7 x 2 x 2.9in. No. of Wells: 49. Tube Diameter: 0.74cm(0.29in); 0.61(0.24in) Taper. Tube Capacity: 0.5mL and 0.2mL. Thermo Scientific® ELED #: 2058Q. Thermo Scientific ELED - “Every Lab, Every Day”.