Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Almost perfect

I needed vents for my observation hive. I would have preferred something a bit smaller made of brass, but this is the best I could find. Keeping my fingers crossed, I ordered these up. After assembly of the hive, I found that they actually look pretty good and they do provide the ventilation required for the hive. The louver spacing is also small enough to prevent unintended escapes. A 1" wood auger makes a hole perfect for proper fit. They are well made and the price is right.