Argos R3130 Translucent Polypropylene 100 Place Microcentrifuge Tube Cryogenic Storage Box with Assorted Color Lids for 0.5, 1.5 and 2.0mL Microcentrifuge Tubes (Pack of 5) Constructed of translucent polypropylene; can withstand temperatures from -80C to +121C Accommodates 0.5, 1.5, and 2.0mL Microtube as well as most manufactured brands of cryogenic vials Each box has a dual alphanumeric grid (inside and outside), impressed rings for stacking, and a matte surface for printing or labeling Lock and seal triple hinge and locking clasp keeps your samples secure while the box is closed The lids come in blue, green, orange, purple, and natural (clear) and the box bottoms are clear for easy visual inspection