It is engineered for safe and efficient solvent waste handling in laboratories. Designed with a freely movable PTFE insert and multiple capillary connection ports, this cap supports connecting capillaries with outer diameters of 1.6 mm, 2.2 mm, or 3.2 mm, as well as hose olives for tubing with inner diameters of 5.5 to 8 mm. It ensures leak-proof sealing and chemical resistance, making it ideal for chromatography and waste management systems. A b.safe exhaust air filter can be screwed into the GL14 thread (filter sold separately).