HIGH : This tube rack is made of solid plastic, sturdy, light weight and durable to use.DETACHABLE: This plastic tube holder comes 3 separated pieces, required; can be stored put or taken apart and laid flat, 't take up much more space.EASY TO INSTALL: Three-tier design permits convenient insertion and removal of tubes. Easy to disassemble and install, convenient to carry.EASY TO CLEAN: Durable and long service life, easy to clean.Single product specifications:Specification: 21 holes: 30mmColour: WhiteMaterial: PlasticSize: 245 * 104 * 70mmPackage Contents:3 x pack test tube racks, comes with unssembledOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.