Goplus Portable Greenhouse 8 Shelves Mini Walk in Outdoor Green House 4 Tier w/PE Cover for Garden Patio Backyard (56" &times;29" &times; 77") Maximize the Use of SpaceThe greenhouse has 4 tier and 8 shelves, this can make the best use of space and places more plants. Excellent TransparencyThe surface of the greenhouse is covered with transparent plastic, it allows more sunlight to keep plants warm and be good for the growth of plants. Sturdy and DurableThe frame of the greenhouse is made of steel which makes it less vulnerable to external shocks and collapsing. And the steel surface is coated with green powder coating which will extend its service life. Easy to OpenYou just need to pull the zipper, roll the curtain up and get into the greenhouse. Easy AssemblyThe instructions are simple and easy to understand, you can assemble this greenhouse only in a few simple steps.