Used these caps (2) on a Toro zero-turn mower with a 6' deck. The old caps were both cracked. The new caps fit tight, and I wasn't certain that they were going to work. One was tighter than the other. But they did go on, with a bit of oil used on the threads, and have conformed to the tank necks. I think the whole mess is somewhat mis-manufactured from the get-go. In the end they worked and didn't leak. I'm happy but not ecstatic.Exact same and the original that split. One day I could see the tank was wet and noticed the cap was cracked. Ordered this one came quick and works greatGreat fit well built. I think the description says 8 x 8 or something like that it is not. It was a perfect fit. Yes it is the larger gas cap for a ToroIt was the correct one for the mower I bought it for.Just what I neededSaved a lot of money worked perfectFits like oem part. Thank youI bought this for my Toro z master. It was a perfect for the price.it fit perfect