content: THis is the second order of these fly traps. We tried a locally available fly trap after the first order was completely full of flies but the other brand just didn't do the job so we reordered these to use in our horse barn. These are WONDERFUL. Within minutes of hanging them, the flies started collecting. We hang them just over head level at each of the entrances to the barn and the arena and they do a superb job of ridding the barn of pesky flys that annoy our stallions.