These versatile plastic centrifuge tubes can be used in laboratory analysis. So you cannot miss this set Smooth side walls, good transparency, good sealing, the sample is not volatile, practical scale of impression measurement experimental, fit for most laboratory tests. Features - Color: Transparent and blue. - Material: PP. - Size: 12.00X2.10X2.10cm/4.72X0.83X0.83 inch. - Capacity: 15ml. - High-quality plastic material, ultra-high transparency, easy to observe. - Centrifuge tubes are great for laboratory tests. for samples, food coloring, craft use, etc. - With clear scale design, the tubes can be used to do the precise measurement experiment and so on. - The tubes come with screw caps, which offer both vented and fully closed positions. - Centrifuge tubes are generally used in fields of biochemistry and molecular biology.