This item is test tube rack, which is made by premium aluminum material with for durable use. Displays your favorite chemistry-inspired shot glasses. Sits easily on any countertop, table, or bar. It is easy to carry and provides a presentation that is sure to excite student. for laboratory tidy your centrifuge tube. Feature - Color: Silver. - Material: Aluminum. - Size: About 21.8x8.7x6.5cm. - The solid construction is sturdy and easy to wipe clean. - Made by premium material with for durable use. - An necessary equipment for laboratory, and your won't look so messy with it. - for laboratory tidy your centrifuge tube. - It is lightweight for convenient to storage and carry. - Perfect for school, provide clear view of the tube contents and convenient insertion and removal of tubes.