Light Labs has established a wide and increasingly divers range of durable freezer racks which are immediately compatible with your existing freezer racking system. As with most of the Light Labs' rack range, these are constructed from tough and durable polypropylene. In addition to the superb mechanical qualities of this material, these racks can be autoclaved if required and are suitable for use in freezers as cold as -90C. The 100 and 50 place racks have a hinged lid with a snap latch on the front. The 81 position rack has a clear, lift-off lid, which has two frosted writing panels. Clearly marked indexing allows fast identification and location of your tube samples. All of these racks will accommodate both snap top and screw top microcentrifuge tubes up to 2.0mL as well as cryovials up to 1.2mL.