Product review (2 stars): Wrinkled in box, tough to install, worked for a while but now it's leaking again
It was deformed in the package, and vulcanized to itself, requiring careful work to peel it apart and stretch it back into original shape for installation. Put it in an appropriately sized box next time.

It lasted a whole year.
Now it's got a nice little rip in the bottom , my machine is leaking again, and I need yet another bellows.