 All right. Well, that's one of the easy parts about trim a slab. If you've got a typical driveway sidewalk, they used one by four on edge for these expansion joints. And those are typically three quarters of an inch wide. So our three quarter of an inch size fits the three quarter of an inch gap. And it'll do plus or minus an eighth of an inch. So you can have substantial variation and that one size is going to fit.