It is a high-quality laboratory cap designed for secure and precise solvent handling. Manufactured by Bohlender, this cap features a GL45 thread and is made from durable PPS material. It comes equipped with three UNF 1/4" female threads for connecting capillary tubing with an outer diameter of 3.2 mm, ensuring leak-proof connections. The cap includes freely movable PTFE inserts to enhance flexibility in tubing connections. Integrated stopcocks allow precise flow control, and an air valve with a service life indicator ensures safe and reliable ventilation.