Horizontal Bar: a sturdy metal support for your greenhouse frame, W-1 and W-2 bars, and door. Made of 32mm galvanized steel, it's durable and reliable. With flattened heads on both ends for easy bolt and nut assembly, it provides extra support for your greenhouse arches. Available in three sizes, including a 2.95m option for 4m greenhouses, it ensures stability and strength for your greenhouse structure. Simplify assembly and reinforce your greenhouse with this versatile component.