A precision-engineered external ground glass joint reaction tube for laboratory chemical reactions, fitted with a PTFE valve. Manufactured from high-quality borosilicate glass for excellent thermal and chemical resistance. Key Features 

✔ External Ground Glass Joint – Ensures tight, leak-free connection with compatible glassware. 

✔ PTFE Valve – Enables precise flow control and boasts strong resistance to corrosive substances. 

✔ Borosilicate Glass – Offers excellent thermal shock and chemical resistance, suitable for various reaction conditions. 

✔ Straight Tube Design – Provides ample space for reactants and facilitates easy monitoring of reactions. 

✔ Reinforced Valve Connection – Ensures durability and stability during frequent operation.