The sealing designs of these bleed valves eliminates the need for additional sealants, offering a hassle frees installation that ensures long lasting reliability Suitable for homeowners, enthusiasts, and professional plumbers looking to quickly and effectively release trapped air from radiators, enhancing heat distribution throughout room upgrades your home heating efficiency with these Radiator Bleed Valves, a must have for maintaining best radiator and energy savings Crafted from plated brass, this pack of 6 bleed valves features a rotating head, ensuring easy and secure fit for all standard 0.5 inch threaded radiators Perfect for use in residential or commercial settings, these radiator valves are designed for simple integration into any heating Systems maintenance routine, Manufacturer: REITINGE