The box is a made from 1/2" EMT conduit and filled with 3/4" foam board insulation. I made a plywood top and base to finish off the sides. One of the sides swings open and makes the door. I wrapped the sides in Mylar and used foil tape to block out the light. It works great so far. I wished I would had made it a little bigger. After I finish my grow I can do a detailed post on the box.

Thanks

RockLobster4040