brake junction blocks

[seani]

Hi, does anyone know what shape the internal seats of the brass brake junction blocks are front and rear. Are they all concave, convex or a mixture of both? By concave I mean like the booster ports and M/C outlet ports and convex like the M/C inlet ports.

Sean

[papajam]

I believe the junction block seats are convex (ie, they take a double inverted flare brake line).