MTC Bio Reversible Racks feature the perfect combination of durability and convenience for organizing and storing 0.5mL and 1.5mL( up to 2.0mL) microcentrifuge tubes. Crafted from polypropylene, these racks feature 5 rows of 12 tubes (60 tube capacity) in blue, and 8 rows of 12 tubes (96 tube capacity) in orange. Alphanumeric markings provide easy identification and organization, and the racks are supplied in packs of 5.