The package includes 2 pieces pipe connection reduction fittings and 4 washers. 2 Pieces G 1/2 sealing rings and 2 pieces G 3/4 sealing rings. With the attached sealing ring during installation, the connectors can be tightened very well, and the sealing effect is very good, without the slightest leakage. Transition piece 1/2 to 3/4 is made of high-quality stainless steel, which is durable, rust-proof and corrosion-resistant. Reduction double nipple 3/4 to 1/2 is a practical quick coupling, the model is suitable for installing shower systems, washing machines, toilets, sinks, pump lines, etc. No need to use a hex key compatible with installation, just tighten it to the external thread, and install it directly on the top of the isolation valve. .