EK-DuraClear is the most advanced liquid cooling tubing, designed and manufactured for the most demanding customers, who want to use soft tubing in their builds. The EK-DuraClear structure is formulated to enable it to perform in a wide range of closed loop cooling systems, making it the top choice for every liquid cooling enthusiast. More than 2 years in development, the goal was to create the most durable, flexible and transparent tube on the market. Internal diameter (ID): 9.5 mm (3/8), outer diameter (OD): 12.7 mm (1/2).