Amazon.com : VEVOR Walk in Tunnel Greenhouse, 19.4x9.7x6.5 ft Hoop Tunnel Hoop House Greenhouse with Sandbags and Hemmed PE Cover, 2 Doors VEVOR High Tunnel Greenhouse Galvanised frame, PE Cover Diy High tunnel. Designed as the highest quality, most compact, space saving greenhouse packaged in a retail box. This Polytunnel hoop house cold frame style High Tunnel greenhouse features a space saver design. The modern greenhouse offers all of the same quality, workmanship, and results as the Commercial Series Green House while appealing to beginner, novice, and professional growers alike. Each Deck and Patio greenhouse is constructed from 100 percent commercial grade galvanized steel frame. Featuring quick connect steel frame and steel frame connectors. It includes a rugged all weather triple layer Polyurethane, cover, back panel, and front entry. Rust resistant galvanized steel. The frame components and frame connectors are galvanized after being welded. This Greenhouse provides maximum protection, growth, and reliability by using a complete three piece all growth fabric construction with unit body cover, solid connected back panel, and solid connected front entry allowing for easy access and maintenance of plants, vegetables and herbs. It also utilizes Smart Vent technology controlling airflow from the base of the unit and the ends of the unit with special zip out Velcro held screened vented windows. In addition the triple ridge reinforced roof structure not only acts as a weather guardian protecting against severe and inclement weather but also allows growing enthusiasts to hang their full size basket plants from the roof of the green house. Triple ridge pole roof system safely supports the heaviest hanging plants. All steel construction with flex frame design and 1 1 4 inch, 16 gauge steel for stability. 14 gauge inside steel slip fitting joints for rugged rigidity and easy setup. Galvanized bases bolt to foundation for optimal wind resistance. Measures 8 feet x 12 feet x 6 1 2 feet High. 1 1 4 inch pipe diameter.