4-Way Flipper Racks for Tube Tube Option : Slide 1 : Vol 1.5 ml - 2.0 ml x 32 holes Slide 2 : Vol 0.5 ml x 32 holes Slide 3 : Vol 5 ml or 15 ml x 12 holes Slide 4 : Vol 50 ml x 4 holes Suitable for Use in Ultra-Low temp freezers (-90) (Paradigm, No. Cat. 5410-29)