Package includes: you will get 10 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 replacementGood tightness: the water stop plug is equipped with o-ring rubber gaskets, which provide nice tightness, which can prevent internal liquid leakage and oxidation and prevent dust from entering the liquid cooling device materials: the plug fitting is made of quality copper, and the surface is nickel-plated, which are rustproof or corrosion-proof, can serve you for a long timeThoughtful 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 convenienceApply to: this plug fitting with a size of /4 inch, the diameter of it is 18 mm, suitable for computer water cooling system applications; After being covered, it can store the liquid in the water cooling system for a long timeMaterial:coppercolour:blackPackage Contents:10 x Plug fitting with o-ringOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.