20 Pcs Borosilicate Glass Tubes 4 Inch (10 cm), Thick Glass Blowing Tubes, 2mm Wall Heat Resistant for Lab Experiments DIY Projects Industrial Use, Acid Alkali Resistant, Transparent

["[Premium Borosilicate Material] Made from high-quality clear borosilicate glass, these tubes withstand high temperatures without cracking. Ideal for glass blowing, lab experiments, industrial projects, and DIY creations, providing durability, precision, and reliable performance for every project.","[High Heat Resistance] Designed to handle extreme heat, these tubes are perfect for glass blowing, laboratory experiments, and creative DIY projects. Smooth surfaces and accurate dimensions ensure consistent results, making them a trusted choice for scientific, industrial, and artistic applications.","[Versatile Applications] Suitable for glass art, lab work, classroom demonstrations, industrial tasks, or DIY projects, these tubes deliver consistent performance and precision. Their durable construction and exact size make them ideal for both professional and hobbyist glass projects.","[Easy Cleaning & Maintenance] Includes 4 brushes to clean glass tubes quickly and keep them clear for repeated use. Effortless cleaning ensures your glass tubes stay pristine and ready for lab experiments, DIY glass blowing, or creative craft projects without compromising longevity.","[20-Piece Set & Protective Packaging] This 20-piece set includes 4-inch (10 cm) tubes with 12 mm OD, 8 mm ID, 2 mm wall thickness, plus 4 cleaning brushes. Individually bubble-wrapped and packed in a sturdy case, perfect for glass blowing, lab work, DIY projects, or educational use."]