Designed for Pro Modders, OEM System Builders, High End Servers and Workstations, or any build that requires mission critical reliability. Monsoon's new Hardline Premium Fittings for acrylic tube feature Hard/Lock for a connection you can count on. The Free Center Wrench design used to tighten the barb and the compression ring is perfect for tight spaces because it puts the wrench above the fitting plane giving you more room to maneuver than a conventional wrench. The small wrench notches on the compression ring are also a lot less noticeable than big ugly wrench flats or knurling on the side of a fitting which is normally the most visible portion when installed. Best of all, eliminating the knurling gives your fingers a much needed break—World Class Tools. World Class Results.