The Chain Tube Rack is a customizable tube rack, with multiple configurations for 5 mL, 15 mL and 17 mm tubes. Work outside the traditional tube rack box shape, or don’t. You decide. Now you can configure a tube rack to meet your requirements instead of the other way around.The Chain Rack has a unique linkable design that enables the possibility of multiple configurations to form different shaped tube racks. Each well has the flexibility to hold 5 mL tubes on one side or rotate it 180° to hold 15 mL or 17 mm tubes (round and conical bottom). Mix and match the well sizes to create one rack that holds multiple sized tubes in a variety of fun and functional configurations.