Package Include--The kit include 17pcs test tube rack parts: 5pcs rectangular & trapezoid acrylic boards and 12pcs screws, assemble to get the test tube rack with 12 wells for 10ml, finished size about 275x54x80mm. Premium Material --The clear test tube is made of high quality acrylic material, have good strength, durable and long service life, good light transmittance and high temperature resistance. Three Layer Design -- The acrylic test tube bracket with a three layer design can better prevent the test tube from swinging left and right, firmly grip the test tube, and effectively avoid damage to the test tube. Easy to Use --This test tube holder is very convenient in daily life or when doing experiments. You can put your test tube in the hole of the test tube holder, neat and orderly. A Good Helper in Laboratory -- Very suitable for the laboratory, providing a clear view of the contents of the test tube and making it easy to insert and remove the test tube.