Manuals Brands Harbor Freight Tools Greenhouses & Supplies Harbor Freight Tools Greenhouses & Supplies Manuals ProdManuals has more than 6 Harbor Freight Tools Greenhouses & Supplies manual(s) covering 6 model(s). 1 5 6 D G Models Document Type 1 10 ft. x 12 ft. Greenhouse with 4 Vents 5 5FT FOUR TIER GREENHOUSE 6 6 ft. x 8 ft. Greenhouse 6 ft. x 6 ft. Greenhouse D Drip Irrigation Kit G Greenhouse Window Vent Opener