Attach several racks for large experiments Heavy polypropylene construction Glove friendly Hold 1.5/2.0 mL tubes Racks slide together on both sides. Internal ribbing make racks stable and sturdy. The “Hold-It” finger slot on the front of the racks allows racks to be held more securely while wearing gloves. Large, easy-to-read numbers identify tube holes to simplify sample tracking and three color option allows samples to be separated for easy identification.