Product review (5 stars): Fits Perfectly!
This baffle was ordered for our Insinkerator disposal that had a deteriorating baffle in place. Although no instructions came with the replacement baffle, there was obtainable information online. But...here are a few steps to install the new baffle:

1. There is no need to remove your existing disposal from the mounting ring under the sink
2. Using a utility knife, carefully cut the old rubber baffle, from the sink top, as close to the outer edges of the opening
3. Part of the old baffle will remain in place that creates the water seal (where the disposal connects to the mounting ring)
4. Make sure the new baffle is turned right side up and push it down where the old baffle had been cut away
5. Be sure not to push too far so the baffle doesn't fall into the disposal chamber
6. If you do, just pull the flexible baffle out and try reinstallation once again
7. The new baffle has a positioning, or stopping point, to allow for a good fit
8. Be sure to check your disposal model first before ordering as some reviewers had issues with a proper fit