The rear of the master cyy is 9/16 inverted flare and goes down to1/4 on prop. valve,the front is 5/16 from m/c to 5/16 prop, the two front lines from prop to front brakes are 3/16, I had to plug one of the front lines at the p/v then T out of the line lock,Our aeroquip store closed so I had some parker lines made [black]They didnt have a 9/16 fitting anywhere so I drilled out the old one for 3/16 brake line and made a double male with 5/16 at the other end. Im curios whats everyones opinion on single flare VS double flare.I have nowhere near the exp, and car knowledge of y'all I have always single flared the 8 or 10 times I've made hard lines and never a leak,but I would like to know what you guys think.thanx