PrimoChill Anti-Kink Coils 1/2in. - Black Made of strong and durable PVC and packaged in pre-cut 40" lengths--typically enough for a single CP Pre-cut 40" length. One length is typically sufficient for a single CPU cooling circuit depending on Note: Two lengths may be necessary for a complete circuit including dual CPU, CPU+VGA, or CPU+VGA+Ch 1/2" will fit 1/2in. O.D. Tubing, 3/4" will fit 3/4in O.D. tubing, and 5/8" will fit 5/8 OD Tubing Inexpensive mod for a fresh new look!