Microtube Racks: 80 Well. Polypropylene. holds 1.5ml or 2.0ml microtubes. ISO and CE certified.. Microtube Racks: 80 Wells.1.5ml or 2.0ml Microtube Compatible. Polypropylene. 5 Assorted Colors: blue, red, yellow, purple, and green. Autoclavable. Chemically resistant to alcohols and mild organic solvents. 20 racks/case. ISO CERTIFIED.CE certificate is available from Biologix now! Microtube Racks