PrimoChill is once again helping performance enthusiasts case modders and those in search of silence find the true path to water cooling zen with PrimoChill Anti-Kink coils Think of them as Yoga for your PCs water cooling system--improving the flexibility of your tubing in those tighter radius location to prevent kinking that can stop or decrease coolant flow PrimoChill Anti-Kink Coils will have your machine looking and performing greatand you calm and relaxedNote One length (40in) is typically sufficient for a single CPU cooling circuit depending on how tight the coils are wrapped around the tubing Two lengths may be necessary for a complete circuit including dual CPU CPU? or CPU???? setups