42'W GrowSpan Round Premium Extra Tall High Tunnels, also known as hoop buildings, provide more space for growing and tending your crops. Extend your growing season! Let a High Tunnel enhance growth, yield and quality! Outgrow your competition. Grow all year long!

• Constructed from 14 gauge, 1.90" OD USA-made, triple-galvanized structural steel tubing.
• Vertical, 1.90" OD center row supports add strength and durability.
• Sidewall height: 4'. Ridge height: 15'.
• Cover is single layer, 6 mil 4 year greenhouse film.
• Easy to ventilate with our exclusive "Twist-of-the-Wrist" Roll-Up Curtain Assembly.
• Ends are manufactured from 10 oz., 22 mil translucent fabric with 4 zippers now feature our heavy-duty, industrial-strength #15 Big Zip Zippers.
• Ground posts and two rows of 1.315" OD purlins are included.
• Top and bottom baseboards are recommended. Our Recycled Plastic Lumber, sold separately, comes with a 50 year warranty and is ideal.