Kurtzy Clear Plastic Test Tubes with Screw Caps & Cleaning Brush (25 Pack).Included in our set is 25 plastic test tubes. Our set also comes with a cleaning brush. Our test tubes can hold liquids, powder and solids. All the test tubes in our set are BPA free and food safe. As they have a screw top lid, they can be used with liquid and food as the lid will keep the contents inside fresh and sealed. Our test tubes are crystal clear in appearance so you can see exactly what is inside.What's Included:-25 x Test tubes.-1 x Cleaning brush.Dimensions:-Length including top: 10.4cm (4.09 inches).-Width: 3cm (1.18 inches).-Lid height: 1.4cm (0.55 inch).-Opening Diameter: 2.2cm (0.86 inch).-Capacity: 50ml.-Brush length: 20cm (7.87 inches).