Package includes: you will get 2 pieces of plug fittings, each plug contains a rubber sealing ring, you can use it in your computer water cooling system; Sufficient quantity can meet you demands and replacement Good tightness: the water stop plug is equipped with o-ring rubber gaskets, which provide nice air tightness, which can prevent internal liquid leakage and oxidation and prevent dust from entering the liquid cooling device Selected materials: the plug fitting is made of quality copper, and the surface is -plated, which are rust proof or corrosion-proof, can serve you for a long time Thoughtful design: the water stop plug is designed with a minus groove design and non-slip texture on the surface, no tools are needed, and the installation can be completed by simple tightening by hand, which provides you with convenience Apply to: this plug fitting with a size of G 1/4 inch, suitable for computer water cooling system applications; After being covered, it can store the liquid in the water cooling system for a long time