ST-UJBThe ST UJB gives you any 90 junction you'd like just by adding additional half coupler pieces. Two sides of couplers are included so you are ready to make a 2 way 90 right out of the box. Need it to be a three or four way junction? Simply bolt on additional half couplers and you're there. The UJB is made from the same high strength 6082 T6 aluminum as the rest of our 12'' truss. 6082 aluminum alloy is gaining in popularity over the 6061 alloy that is