XSPC G1/4" to 3/8" Barb Fitting for Soft Tubing, Matte Black, 12-pack Go to amazon.com Related posts Thing need consider when find watercooling pc fittings? Feature3/8" Barb FittingG1/4" ThreadFor 3/8" ID Tubing (10mm ID)Matte Black Finish DescriptionXSPC barb fitting for water cooling systems with easy tool-free installation. Model: TR-5060175588500-12P.