【High-Quality Materials】This straight hose air seal is made of high-quality brass and plastic, durable, resistant to aging and abrasion, ensuring maximum strength and durability for long-term use. 【Detailed Size】You will receive 10 black PG8-6 variable diameter air seals, with a total length of 3.5 cm and two adjustable diameters, suitable for hoses with diameters of 6 mm and 8 mm. 【Plug-in Design】Simple push-in design, no additional sealing required, secure connection and easy installation. High pressure resistance, no tripping; the quick connect air fittings can withstand increased pressure without tripping. 【Shuttle Rings】There are shuttle rings at both ends, made of metal, which is convenient for pneumatic installation in tight spaces. The adhesive-resistant PTFE-coated thread has excellent adhesion and a good seal. 【Versatility】This pneumatic fitting can be used to connect polyethylene, nylon, and PU hoses. It can be used in the pharmaceutical, instrument, oil refinery, natural gas, chemical, and other industries.