sorry for lack of info. this is the exo Terra reptile incubator temp is a steady 90 degrees at the eggs not the source. and humidity is at 85% i couldn't find an egg box in time for that would fit the unit but again the humidity and temp is constantly where i want them. the humidity is supplied by a small layer of water in the bottom of the fridge. they are mostly stuck together so i couldn't find a way to separate them. i am still trying to locate a good size box that will fit this fridge, and i have picked up a container of vermiculite.