My husband's dad, the Farmer, sent us a package in the mail earlier this week. I squealed when I saw it! I've been totally drooling over seedling heating mats, but have not wanted to actually buy one since they can be a bit pricey. This one can fit 4 large flats on it. It also works great, within a few days, I noticed the celery started to germinate. Woot Woot!