This attractive, crystal-clear acrylic test tube holder is an effective way to display the difference in the amount of sugar, fat, or fiber in various foods. Because it is clear from top to bottom, you can compare even the smallest amount of sugar, fat, or fiber. A great addition to your tool box and an impressive display in your waiting room or office. Holes are 5/8 in. diameter. Works well with the Deluxe Lipo-Visuals™ assortments, or display three of the 12 packs at the same time. Better yet, compare the amount of fat and sugar found in 18 foods all in one rack. Overall dimensions: 18-1/2 in. L x 2-1/2 in. H x 2-3/4 in. D.