The wood is just a $3 2x4 from Lowes, probably pine. The wooden egg holders are now in use in my incubator. The first 24 hrs, I did not add any water to the bator and the humidity was 36%. This morning I added some water and the humidity came up to 43%. So far, I'm pretty pleased. It only takes about 15 seconds to turn 52 eggs. We hand turn 3x a day. I do plan on taking the eggs out of the holders for lockdown when the humidity needs to be high. As long as I can maintain humidity in the 40's for 14 days, I'll be happy.