borosilicate glass material offers advantages: This 20ml scintillation vial is made of low-potassium borosilicate glass. This bottle type has excellent thermal and chemical inhibition properties, as well as a low thermal expansion coefficient (33) allowing it to withstand harsh application environments. Excellent scintillation counting repeatability: We strictly control the diameter and thickness of the sample vials to consistent measurement results every time. In addition to excellent light transmittance, clear scintillation vials allow you to conduct sample inspections quickly and clearly. Multifunctional Silver Screw Cap: The white silver screw cap with silver aluminum foil lining has excellent pressure resistance and can be applied to weak, , solvent, alcohol, oil and solutions. Effectively avoid tobacco waste in the laboratory. The top of the cap makes it easy to add labels. To quickly identify and store samples, we stock them in the most efficient way: each package contains 100 clear glass bottles and 100 white caps (caps pre-tightened). All scintillation vials are proposed to be arranged in honeycomb trays with alphanumeric coordinates. A wide range of community areas including chemistry, education, research and life sciences: these 20 ml vials play a vital role whether they are used in activation counting instruments or as lotion bottles and for packaging small samples. This product is perfect for other uses in laboratories and multi-purpose applications. Colour:P o Color Material:plastic + glass Package Contents: 100 x Scintillation Vials Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.