Tubing sets made with PTFE tubing in 1/16 in. and 1/8 in. O.D. sizes are cut in the appropriate desired lengths and assembled with the distinctive, permanently attached, color-coded Ferrulok fitting system on one or both ends. Combinations of multiple and single tubing sets can be prepared to plumb complete instruments. Multiple tubing sets can be supplied loose or bundled in a polyester mesh wrapping.