Our master kit, FLRK-12, contains connectors, compression unions, adapters, and nylon fuel line needed to make quick and cost-effective ½” and 12mm replacement lines. Save technician's time by having all components in one kit and not having to search for any special tools to make the same quality nylon fuel lines used in new vehicles! The convenient push-button thumb release makes connections fast and easy. The nylon lines hold up to 200 PSI. Save your customer's money by making a complete replacement line in less than 5 minutes!