I was looking for a 2.5" (7259) or 3" (7260) flange with about 3 3/16" centers and both the 2.5" and 3 "Versions are either too big or too small. Judging by the picture, the 3-inch version has a center-to-center spacing of approximately 3 6/16", while the 2.5-inch version has a center-to-center spacing of 3 1/16". has. Both are about 0.25" thick. regular shim (cardstock) but the smaller 25" came with felt fabric. Not sure how that counts as a shim. Overall both didn't work for my application.