Borosil 4100 - Narrow Mouth Flat Bottom Flask, Short Neck With I/C Joint are designed to deliver the best combination of thermal shock resistance, physical strength and resistance to chemical attack. They are made so as tp withstand the demands of the modern laboratory. Flasks with interchangeable joints are particularly suitable for all glass apparatus assemblies. Available on EnvMart, these Laboratory Glasswares are crafted from high-quality materials using advanced techniques to ensure precision and durability. Borosil Glasswares are trusted for their accuracy and reliability, making them a preferred choice in laboratories for various scientific applications.