Multi-Functional Microtube Rack by Biologix is a double-sided electric pink rack: one side holds 80 tubes of 1.5 mL, 2.0 mL or flow cytometry size, and the other holds 60 tubes of 0.5 mL or 0.2 mL. Brackets and snaps connect several racks together for more positions. Supplied non-sterile, 20 racks per case, for benches that handle several tube sizes.