6777 are lightweight aluminium alloy tubes popularly used in the construction of buildings, ships and other structures. They are corrosion resistant, non-magnetic and have excellent strength-to-weight ratios. 6777 tubes can be used in a variety of applications, such as boat frames, guard rails, ladders, fencing and signage. They are also commonly used in the construction of towers, bridges and other structures. Additionally, 6777 tubes are used in automotive, aerospace and military applications.