The Kan-therm Ppsu Tri-Stack Zapper 20x2 is an excellent choice for central heating needs. It is made from high-quality materials, offering reliability and durability. Its pipe has a diameter of 20 mm and a thickness of 2 mm, ideal for efficient heat transfer in your systems. With the design and innovation behind Kan-therm, you can be confident that you are investing in a product with long-lasting use and excellent performance.