Features: These Radiator Valves Caps provide protections for friend and family, especially children, eliminating the danger and risk of exposed radiator Valves stems. These Radiator Valves Caps is easy to install and require no special or complicated tool to install. Make from plastic materials, which is strong and enduring to ensure long terms use. Our Replacement Cover Valves is designs to fit most radiator valves. Equipped with a M30x1.5 thread size, provide a reliable connection for your heating needs. Specifications: Materials: Plastic Styles: Long/Short thread: M30x1.5 Long height: about 50mm/1.97inch Short height: about 40mm/1.57inch Package Includes: 4Pcs Radiator Valves Caps note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.