Here's a very nicely made imported bridge that looks similar to what you'd find on most Rickenbacker six strings guitars. If you have a real California Rickenbacker good for you. In my opinion they're one of the very greatest American guitars and you should use only Genuine Rickenbacker USA parts. Yes, they're expensive but totally worth it. If you've got an imported copy guitar or need a good affordable bridge for a flat top project guitar give this bridge your serious consideration. What is the string spacing and maximum height? I measured 47.91mm E to E centers. It's tricky to give maximum height measurements because of the black bridge height tension springs. I observed the following measurements with the four springs in place a maximum compression and with the bottom plate in place; high E 24.04mm, B 24.48mm, G 25.04mm, D 25.11mm, A 24.51mm, low E 24.00mm.