MATERIAL AND DIMENSTIONS- the sample tube rack is made of solid plastic, sturdy and durable to use HOLDS 24 TEST TUBES - 24 holes, the width of the hole is 25mm, perfect for holding test tubes whose max diameter is 25mm or under DETACHABLE FEATURE- the plastic test tube rack comes 3 separated pieces, required; can be stored put or taken apart and laid flat, 't take up much more room SIMPLE TO - just fold the arms up, and insert the slotted holders and snap . It holds WIDE APPLICATIONS - Work great for test tubes holding beads for jewelry making, holding gumballs/treats/candy/ for christmas gift, holding liquids for lab experiment, perfect , school classroom, lab use Number of holes: 24 holes : 25mm Size: 245 * 104 * 70mm Material:plastic colour:white Package Contents: 2 * test tube racks Only the above package content, other products 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.