Are you search of versatile centrifuge tube racks? Look no further than our centrifuge rack, great for test tube storage. It can withstand daily use, the smooth surface prevents damage to tubes or hands, sturdy materials, suitable for organizing test tubes. Features -Color:Multi -Material:PP -Size:25.00X11.20X6.70cm/9.82X4.40X2.63in -Size:25.00X11.20X6.70cm/9.82X4.40X2.63in -Size:21.00X11.20X6.70cm/8.25X4.40X2.63in -Note:suitable for 13mm,16mm,18mm hole diameter tube, can holds 50pcs tubes(not included)/rack. - Versatile and functional, can hold test tubes and centrifuge tubes, improving work efficiency. - The test tube holder has proper capacity, making it easy to organize tubes. - The sturdy construction of tube rack makes it can be used for long term, not easy to break. - The test tube holder can be placed on table or shelf for easy access during experiments. - Lightweight, the tube stand is easy to take, convenient to store, a tool for most researches. Package list: 1 x Centrifuge Tube Rack 13mm 1 x Centrifuge Tube Rack 16mm 1 x Centrifuge Tube Rack 18mm