Sturdy Brass Construction: Crafted from premium brass, this 3/8 inch return pin valve insert ensures exceptional durability. Its robust design is ideal for underfloor heating systems, providing reliable performance and resistance to wear and tear. M30 x 1.5 Thread Compatibility: Designed to fit seamlessly with various UFH actuators, this valve insert features an M30 x 1.5 thread size. It ensures a secure and reliable connection, making it a versatile choice for your heating system installations. Simple Installation Process: This valve insert can be installed quickly and effortlessly without the need for tools. Its user-friendly design allows for a hassle-free setup, helping you get your underfloor heating system up and running in no time. Optimized Fluid Flow Control: Engineered to enhance fluid dynamics, this valve insert facilitates efficient flow control within your floor heating applications. It helps maintain optimal operation, ensuring your environment remains comfortably heated. Long-Term Reliability: Built to last, this valve insert promises steady and dependable performance over extended periods. Its quality construction and functional design make it an excellent investment for maintaining the efficacy of your underfloor heating system. Color: As Shown Material: Copper Package Contents: 4 x Spring Valve Core Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.