It is a high-quality waste cap designed for laboratory use. It features three UNF 1/4" connections and one GL 14 connection, allowing for easy and secure fitting with various laboratory systems. The cap includes a free movable PTFE insert for connecting capillaries (O.D. 1.6/2.2/3.2 mm) and hose olives suitable for tubing with I.D. 5.5 to 8 mm. Made from durable polypropylene (PP), this cap ensures longevity and chemical resistance in demanding environments. A b.safe exhaust air filter can be screwed into the GL14 thread (filter not included). Ideal for safe waste collection and containment, this waste cap is a vital accessory for laboratory operations.