1、Excellent 304 Stainless Steel Material: This test tube holder rack is made of excellent 304 stainless steel material, which is sturdy and abrasion resistant, not easy to be damaged, and has a long service life. 2、Highly Polished Surface: This laboratory test tube rack holder features a highly polished surface, without corners and incisive edges, which is chemical resistant, safe and reliable. 3、Multifunctional: This centrifuge tube holder is multifunctional for hanging test tubes or colorimetric tubes during chemistry experiments and drying test tubes, freezable, autoclavable, and long lasting. 4、Compact And Portable: This stainless steel test tube rack is small and lightweight, very easy to carry and use, can be used to save a lot of space in the laboratory by placing test tubes in an organized way. 5、Wide Application: This test tube holder has a wide range of applications and is perfect for holding sample tubes, lip balm kits, essential oil preparations, cosmetics, ink kits and other cylindrical objects. It meets the needs of daily science, laboratory, studio, cosmetic storage and so on.