Master-Lee Engineered Products hydraulically operated Flux Thimble Expansion Tool offers a safe and reliable method for expanding your flux thimble tubes. The primary purpose of this expansion is to enable the use of standard Swagelock® fittings when coupling non-standard size tubing. Lightweight and portable, this hand-held hydrulic unit is easily and readily mobilized to your jobsite. Manually operated, the Flux Thimble Expansion Tool will efficiently adjust your 0.300″ diameter flux thimble tubes to the necessary 0.314″ diameter for its mating Swagelock® ferrules.