name='!TIMMY!' said:They are just standard barbs, you don'tneeds special barbs for the res, cpu block etc.
Well in the sense of screwing them into the pump, res, waterblocks and pumps yes but in sense of hose diameter, no. The threads on the end of the barbs that screw into these things tend to be pretty standard at G1/4"
Most popular sizes of tubing tend to be 1/2", 3/8" & 1/4" I believe. The measurements are ID (inner diameter) of the tubing and match up with corresponding barb sizes.