a magic chef mini fridge/wine cooler thing 4.6 cubic feet. we have plenty of heat tape and a thermostat on the way. i was going to by one of those LLL whatever they are called but i saw this, i liked the size and russ said he could make a better incubator out of a cardboard box, some styrofoam , glass beads and duct tape. so here he can have fun with this.