PrimoChill 1/2in. Rigid RevolverSX Series Fitting - UV Red - 12 Pack SpectraX powder coated caps for unprecedented color correctness and long term consistency. G 1/4 threaded brass core plated in bright nickel for unbeatable corrosion resistance. A continuous industry leader in style and function within the water cooling community. Compression caps created in a multiple step process that achieves corrosion resistance with an uncompromised finish. Patent Pending Design***