When you pick up your kit, we will give you a PVC pipe with two caps on each end. That is where your mason bees start out in while they are still in cocoon. When you get home and mount your kit, take off the tape that is on one of the caps. The mason bees will chew their way out of the cocoons and fly out of the drilled hole. Once the males have hatched, they will begin to scent mark the outside of the tube to know where to come back to find the females. You can leave the tube in the house for the entire season and bring it back to us when you return your bees. If it falls out later in the season, that is OK, the bees will have already emerged and what is left are empty shells. If it does not want to stay put in your house, use some crumpled newspaper around it to wedge it in place.