Features: Package includes: 25 pcs 50ml centrifuge tubes with leak-proof screw caps, are 28-well tube holder racks. Made inquality plastic material, waterproof, durable. Plastic graduated centrifuge tubes also include a convenient white writable blank label for easy marking and identification. nice for labeling. And the test clear tubes with screw caps. Very suitable for the fields of biochemistry and molecular biology, such as separation and preparation of various biological samples. Apply to loading solid, powder, liquids, oils, pills, and other objects, etc. We offer round/flat/conical bottom centrifuge tubes sample storage container. Environmental friendly and non-toxic, they are also reusable after clean. Widely used for scientific research laboratory, hospitals, epidemic prevention station, school, also great for organizing small items in the workshop and home. Specifications: Material: Plastic Color: Transparent Size: Approx. 205x97.8mm/8.07x3.85in Weight: Approx. 320g Package Includes: 25 Pieces 50ml Plastic Centrifuge Tubes with Screw Caps 2 Pieces 28-well Centrifuge Tubes Holder Racks note: 1.Please allow 0-1cm error due to manual measurement. make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you