Ek fc terminal dual serial is a high quality interconnect for connecting two 2 ek full cover waterblocks in a single sturdy unit connecting multiple graphics cards fc water blocks with awkward fittings and tubing is a thing of a past the terminal is made of high quality acrylic material there is no need to purchase additional links since the ek fc terminal is mounted directly to the water block serial and parallel water flow is graphically explained in the installation manual for use wit