The FisherbrandTM 502749464 is a polypropylene microcentrifuge tube rack that holds 64 tubes of 1.5mL capacity. It has alphanumeric grid references for easy sample identification and location. The rack is made of durable autoclavable polypropylene and can withstand temperatures from -20°C to 121°C. It has dimensions of 127mm x 127mm x 45mm. This microcentrifuge tube rack allows for organized storage and easy access to samples in the lab.