Ratek blocks

For cuvettes, flat base 96 well plates (flat, tapered point, round bottom, tapered well), Falcon tubes (12x15 mL, 4x50 mL), microcentrifuge tubes (20 holes 1.5 mL, 30 holes 0.5 mL, 48 holes 0.2 mL, 20 holes 2 mL)