3/4" Brass Hex Caps: Our brass hex caps fit all standard 3/4" pipes. Compatible with most standard threaded fittings on the market. Ideal for changing port caps and preventing pipe leaks. Selected high-quality solid brass: The hexagonal brass cap is made of high-quality solid brass, which has resistance to corrosion. corrosion, high temperature ductility and low magnetic permeability. Not easy to break or deform, sturdy and durable for long service life. Finishing Thread: Inside the hexagonal brass cap is finishing thread. For sealing the ends of pipes or fittings, it does not slip when tightened by hand and tightens easily. Leak-free and easy to connect and disconnect. Leak-proof rubber seal: Each hexagonal brass cap is equipped with a rubber seal for maximum leakage protection, and the pipe seals ensure safe, leak-free installation. Brass hexagonal plug with frosted surface and solid texture. Wide use: Brass hexagonal plugs, suitable for garden hoses, faucets, plumbing valves and other watering equipment accessories of garden. Can be used on washing machine valves, radiator valves, garden timers and other accessories. It is an ideal replacement accessory.