* No toxicity issues for your plants. * Larger than competitive huts to accommodate Botanicare® 2’ x 4’, 4’ X 4’ & 4’ X 8’ trays or other growing systems. * Thick black canvas exterior. * Highly reflective silver interior. * Heavy-duty zippers. * Metal framing is made of strong and durable steel tubing. * 2 - 6” duct flanges included. * Venting and cord holes offer sleeves with draw strings to seal the exit ports around ducting and cords. * 4' x 8' Sun Hut™ has a removable divider wall in the middle. * 4' x 4' and 4' x 8' models have zippered doors in the back for easy access on both sides of the Sun Hut&38482;. * Bracket to support exhaust fan and filter. * SILVER INTERIOR IS 30% MORE REFLECTIVE THAN WHITE PLASTIC INTERIOR