I just installed this in my home brewery and I am extremely pleased with the size and quality of this sight glass. It comes apart very easily for cleaning and the glass is much thicker than I expected. Well worth the cost. You won't be sorry if you purchase one of these.

This sight glass does the trick. It is a perfect size and does not overwhelm my set up like some other bulky ones that I have seen. Heavy duty, easy to clean, does not leak, and the sight window is plenty big enough to see the wort go from cloudy to clear during the mash. You could get creative and use this sight glass in other places too, like on the wort side out of a chiller with an oxygen injection system or stone etc. I would buy this again and can fully recommend this one!