Grow Wise Double Door Cold Frame by EarthCare by EarthCare Greenhouses Dimensions: 39.4" Long x 23.6" Wide x 15.7" High Constructed with 4mm UV resident double-wall polycarbonate panels and corrosion resistant aluminum, makingthis coldframe greenhouse will be a excellent addition to any garden. 2 large easy opening lids give you easy access to your plants. The lids can even be secured open to provide adequate ventilation to the contents.