This reversible rack comes with a simple-to-use removable hinged lid that snaps in place on either side of the rack. Rack and lid are molded out of autoclavable polypropylene. PCR® side of the rack has 168 wells that hold 0.2mL tubes. The wells will accommodate 8 or 12 tube strips or individual tubes. The opposite side of the rack has 40 wells that hold 0.5mL tubes. Also, there are 12 wells for 1.5mL tubes on both sides of the rack for convenience. Assorted colors (blue, green, purple, yellow, and orange). Packs of 5.