Germination Chamber CurtainsAdd on curtains with a stainless steel rod for keeping sunlight from heating the chamber. This enables using the chamber through warm spring days and into summer. To maintain moisture in the chamber, direct sunlight into the chamber should be avoided. The sun will heat up the chamber so that steam will not be produced. Curtains help to eliminate that issue. They are also great for some flower seeds that require darkness to germinate. 3 8" stainless