Fitment Reimagined: This new concept makes it easier than ever to install custom hard tube liquid cooling loops Four Built in O rings: Maximum leak prevention, secure compression seal, and peace of mind Protection You Expect: Surface treated and a special coating finish provides increased durability and protection from corrosion Build It Your Way: Compatible with liquid cooling components that utilize G1/4 thread ports and 16mm OD PETG, Acrylic, and Copper hard tubing Exclusively Designed Open End Wrench is Included