Solid brass construction, durable and sturdy to use, These tank adapters are service tools, can be applied to vacuum pump These tank adapters provide a tight, secure, leak-free connection Allows you to quickly and easily connect and disconnect high flow Fits for G1/4'' threads Nitrogen equipment or system, SAE 1/4 threaded connection tube Specification: Material: Brass Size: 3 x 1.8cm / 1.18 x 0.7in Internal Thread (Female Head): G1/4'' External Thread (Male Head): 1/4'' SAE Package Includes: 1 x Nitrogen Regulator Adapter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.