The tube rack is made of solid plastic, sturdy and durable to use.
The seal is doing very well and the test tube will not fall out. Each rack features end plates for labeling.
40 holes, the width of the hole is approx 20mm, perfect for holding test tubes whose max diameter is 20mm or under.
The plastic test tube rack comes 3 separated pieces, assemble required; can be stored together or taken apart and laid flat, won't take up much more room.
Work great for test tubes holding beads for jewelry making, holding gumballs/treats/candy/ for christmas gift, holding liquids for lab experiment, perfect for home, school classroom, lab use.