Features: 1. Exquisite workmanship and high quality. 2. With the grain, the friction does not get out of hand. 3. The thread is clear and firmer. 4. Made of high quality brass material, durable. 5. Push button the air exhaust will help to equalize air pressure in water cooling system. Specification: Model: PM-JS-PQDT1 Material: Copper Color: Blue, Red (optional) Thread: G1/4 Heat Dissipation Type: Water cooling products Size: 2cm/0.8" in diameter and 1cm/0.4" in thickness (not include thread) Product weight: 14.5 g Package list: 1 * Exhaust Plug