This tray was not what I thought it was going to be. I bought it because my American Bulldog keeps eating the plastic trays that go inside his crate. I bought this so it would be big enough to set the crate on top of it so he could not get to any of the edges to chew on. When it said expandable tray, I thought it would slide to the length I need and lock into place. There are only two possible lengths and the only length I could leave it at left a seem right in the middle of where his crate could sit. So needless to say after getting home from work, he managed to get at that seem and break pieces off on day one. Within 3 days he had enough torn off that it made the tray useless. I'm done wasting money on these plastic trays that they say "chew-resistant textured plastic for superior lasting power".