Brass blank plugs with 5 mm internal thread. Set includes 3 pieces and rubber gaskets. Please verify the thread size before use. - Hexagonal design: Brass blanks with precise threads and a hex shape for easy installation and wrench grip. They seal the ends of pipes or fittings to prevent leaks. - Material and durability: Corrosion resistant brass for long life. Durable and resistant to deformation; maintains ductility across typical temperatures and has low magnetic permeability. - Size and compatibility: Designed for 2.5 cm pipe ends. Suitable for connecting, blocking, controlling, or altering pipe direction. Compatible with faucets, washing machine valves, radiator valves, garden timers, and other fittings that use standard 5 mm threads. - Practical uses: - Close off an unused valve or branch in a 2.5 cm plumbing line during renovation. - Temporarily seal a line to isolate a section for maintenance. - Cap and redirect flow in irrigation or heating systems without major disassembly. - Key benefits: Reliable seal to prevent leaks, quick installation with a hex grip, durable brass construction, and flexible use across common plumbing scenarios.