
Glass Test Tube with Cork Cap. Customizable Sizes: Available in various sizes including 6*50mm, 8*50mm, 10*75mm, 13*100mm, and more upon request. Logo Printing Service: We can print custom logos and text on all types of test tubes. High-Quality Materials: Made from neutral glass or borosilicate 3.3 glass for heat and chemical resistance. High Production Capacity: Yearly output reaches 200 million units to meet large volume demands. Standard Compliance: Products meet ISO and YBB standards for quality assurance. Fast Sample Delivery: Samples are available within one week of order confirmation. Versatile Applications: Suitable for chemistry, biology, medicine, and forensics for holding, mixing, or heating substances. Durable Heat Resistance: Borosilicate tubes can withstand temperatures over 300 degrees C and direct flame.