The pneumatic plug is made of high quality metal, sturdy and durable. The pneumatic quick connector has good sealing performance.Don't worry about leaking. It is widely used for connection between pneumatic devices and air pipe. Reliable Sealing and Durable Performance. Made from high - quality materials, this round tee pneumatic fitting ensures excellent sealing performance, preventing air leakage and maintaining stable pneumatic pressure. Its robust construction guarantees long - term durability even under harsh working conditions. Precise Fit and Easy Installation. The pneumatic fitting - round tee SMY with 1/2" female threads is designed to fit perfectly with standard pneumatic pipes. Its threaded connection allows for quick and tool - free installation, saving both your time and effort during setup.