Trusted/Experienced Brand (PrimoFlex LRT) Inner Diameter: 3/8 inch / Outer Diameter: 5/8 inch Includes FREE Liquid Utopia and SysPrep–Cooling Loop Pre-Treatment Logo Free (no print on tube) PrimoFlex Advanced LRT Tubing has been designed, formulated, and manufactured for today’s evolving standards in the PC water cooling industry. Advanced LRT has been carefully formulated to perform in a wide range of closed loop cooling systems, creating the most compatible water cooling tubing ever created. Specifications Dimensions Inner Diameter (ID): 3/8in. ±.005 Outer Diameter (OD): 5/8in. ±.015 Wall Thickness: 1/8in Compatibility This tubing is designed to work with 3/8in. x 5/8in. compression fittings or 3/8in. Barb with 5/8in. Clamp. Note: Due to a lack of tolerances in fitting design, we have seen some minor issues when using LRT tubing along with strict size brands such as Bitspowr and Lamptron. Warnings With the use of different components, materials, fluids, and flow rates, results may vary with the appearance of your tubing. Although Advanced LRT is designed to work with a large variety of cooling components the use of alcohols, Ethylene Glycol and as well as any other harmful chemicals is strictly prohibited and will void your warranty. Tubing will stain if dyed coolants are used. Not responsible for any hardware damage. Use at your own risk.