Vague description for people who aren't familiar with feeders. I didn't realize that "40lbs" meant holding capacity and thought this was 17" tall - nope, it's 17" in diameter and 20" tall. Huge! I wanted a feeder for my small chicken flock that could hold a few week's worth of food and this could hold a few month's worth. Otherwise it seems well-made and has pins to adjust the gap the food flows out of at the bottom.