Glass Type: 3.3 Borosilicate Glass. Capacity: 500ml. Joint Size: Standard 24/40. Annealing Point: 560℃. Softening Point: 820℃. Linear Coefficient of Expansion: 32×10-7/℃. Function: Suitable For Essential oil extraction, aqueous extracts, distilled water collection. Applications: Laboratories, homes, research centers, educational settings. QWORK