I read the reviews before purchasing and was a little skeptical about this product. I decided to take a chance and pulled the trigger on this and a 5 gallon metal bucket a while back here on Revain. Both arrived, I put it on a bucket, the lid fit but the locking ring didn't fit. I thought I had it! After taking the time to inspect the locking ring, I found that one side was wider than the other. I turned it over and it fit. it was made for a 5 gallon bucket. Understand! I highly recommend this if you have a 5 gallon bucket of Berrymans Carb Cleaner - B-9 COLD PARTS CLEANER - 5 GALLON. how expensive it is, and the fumes are dangerous. I am very satisfied with this product.