BRASS MATERIAL - Made from brass, the return valve core ensures durability and long-lasting performance. SECURE FIT - With a thread size of M30 x 5, this valve core is perfectly compatible with actuators, providing a secure and reliable fit. EASY INSTALLATION No additional tools or complicated procedures are required to install the return valve core, making it quick and easy to install. Optimal Fluid Control - Designed for excellent performance, this valve core effectively controls fluid flow, ensuring smooth and efficient operation. RELIABLE & DURABLE - Designed to stand the test of time, this valve core provides reliable and long-lasting functionality, ensuring consistent operation over long periods of time.